{"id":"CVE-2016-4020","aliases":["DEBIAN-CVE-2016-4020","DLA-1599-1","DLA-573-1","DLA-574-1","EUVD-2016-5026","GHSA-vcqr-cc8h-57gj","MGASA-2016-0176","RHSA-2017:1856","RHSA-2017:2392","RHSA-2017:2408","SUSE-SU-2016:1560-1","SUSE-SU-2016:1698-1","SUSE-SU-2016:1703-1","SUSE-SU-2016:1785-1","SUSE-SU-2016:2093-1","SUSE-SU-2016:2100-1","SUSE-SU-2016:2533-1","UBUNTU-CVE-2016-4020","USN-2974-1","openSUSE-SU-2024:10233-1","openSUSE-SU-2024:10285-1"],"status":"published","title":"The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32...","description":"The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register 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]},{"url":"https://www.suse.com/security/cve/CVE-2016-6833","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-6834","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-6835","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-6836","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-6888","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7092","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7093","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7094","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7154","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2016-4020","tags":["report"]},{"url":"http://www.openwall.com/lists/oss-security/2016/04/13/6","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-2974-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-2391","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-2392","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-2538","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-2841","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-2857","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-2858","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-3710","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-3712","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-4001","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-4002","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-4037","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2008-0928","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2008-1945","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2008-2382","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2008-4539","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-3515","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4148","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4149","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4150","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4151","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4526","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4527","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4529","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4530","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4531","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4533","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4534","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4535","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4536","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4537","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4538","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4539","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4540","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4541","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4542","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4544","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-6399","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0142","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0143","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0144","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0145","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0146","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0147","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0150","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0182","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-3456","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4964","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2016-4020","description":"The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).","status":"published","published":"2016-05-25T15:00:00Z","modified":"2024-08-06T00:17:30.133Z","updated_at":"2026-11-02T14:33:35.488991Z"}],"euvd":[{"id":"EUVD-2016-5026","description":"The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).","status":"published","published":"2016-05-25T15:00:00Z","modified":"2024-08-06T00:17:30Z","updated_at":"2026-11-03T02:22:48.270082Z"}],"ghsa":[{"id":"GHSA-vcqr-cc8h-57gj","title":"The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32...","description":"The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).","status":"published","published":"2022-05-13T01:07:28Z","modified":"2023-02-10T05:06:07Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T14:54:00.716708Z"}],"nvd":[{"id":"CVE-2016-4020","description":"The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).","status":"published","published":"2016-05-25T15:59:04.927Z","modified":"2026-06-17T00:46:44.877Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:03:25.366449Z"}],"osv":[{"id":"CVE-2016-4020","description":"The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).","status":"published","published":"2016-05-25T15:59:04.927Z","modified":"2026-10-24T10:30:50.30013289Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:02.454775Z"},{"id":"DEBIAN-CVE-2016-4020","description":"The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).","status":"published","published":"2016-05-25T15:59:04.927Z","modified":"2026-09-22T07:01:17.202374652Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:27.627285Z"},{"id":"RHSA-2017:1856","title":"Red Hat Security Advisory: qemu-kvm security, bug fix, and enhancement update","status":"published","published":"2024-09-15T23:56:21Z","modified":"2026-07-01T10:02:40Z","cvss":[{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:53:04.262457Z"},{"id":"RHSA-2017:2392","title":"Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update","status":"published","published":"2024-09-13T16:48:09Z","modified":"2026-07-01T10:02:42Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:53:04.262457Z"},{"id":"RHSA-2017:2408","title":"Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update","status":"published","published":"2024-09-13T16:49:03Z","modified":"2026-06-29T10:17:11Z","cvss":[{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:53:04.262457Z"},{"id":"UBUNTU-CVE-2016-4020","description":"The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).","status":"published","published":"2016-04-14T00:00:00Z","modified":"2026-02-04T04:08:22.889095Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium"},{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:12.261906Z"},{"id":"DLA-1599-1","title":"qemu - security update","status":"published","published":"2018-11-29T00:00:00Z","modified":"2026-03-09T01:18:54.561467Z","updated_at":"2026-11-02T15:46:09.777694Z"},{"id":"DLA-573-1","title":"qemu - security update","status":"published","published":"2016-07-30T00:00:00Z","modified":"2026-03-09T02:09:42.830485Z","updated_at":"2026-11-02T15:46:13.207219Z"},{"id":"DLA-574-1","title":"qemu-kvm - security update","status":"published","published":"2016-07-30T00:00:00Z","modified":"2026-03-09T02:10:31.838961Z","updated_at":"2026-11-02T15:46:13.207219Z"},{"id":"MGASA-2016-0176","title":"Updated qemu packages fix security vulnerabilities","description":"Updated qemu packages fix security vulnerabilities:\n\nAn out-of-bounds flaw was found in the QEMU emulator built using\n'address_space_translate' to map an address to a MemoryRegionSection. The\nflaw could occur while doing pci_dma_read/write calls, resulting in an\nout-of-bounds read-write access error. A privileged user inside a guest could\nuse this flaw to crash the guest instance (denial of service) (CVE-2015-8817,\nCVE-2015-8818).\n\nA NULL-pointer dereference flaw was found in the QEMU emulator built with TPR\noptimization for 32-bit Windows guests support. The flaw occurs when doing\nI/O-port write operations from the HMP interface. The 'current_cpu' value\nremains null because it is not called from the cpu_exec() loop, and\ndereferencing it results in the flaw. An attacker with access to the HMP\ninterface could use this flaw to crash the QEMU instance (denial of service)\n(CVE-2016-1922).\n\nIt was discovered that QEMU incorrectly handled the e1000 device. An\nattacker inside the guest could use this issue to cause QEMU to crash,\nresulting in a denial of service (CVE-2016-1981).\n\nZuozhi Fzz discovered that QEMU incorrectly handled IDE AHCI emulation. An\nattacker inside the guest could use this issue to cause QEMU to crash,\nresulting in a denial of service (CVE-2016-2197).\n\nZuozhi Fzz discovered that QEMU incorrectly handled USB EHCI emulation. An\nattacker inside the guest could use this issue to cause QEMU to crash,\nresulting in a denial of service (CVE-2016-2198).\n\nZuozhi Fzz discovered that QEMU incorrectly handled USB OHCI emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service (CVE-2016-2391).\n\nQinghao Tang discovered that QEMU incorrectly handled USB Net emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service (CVE-2016-2392).\n\nQinghao Tang discovered that QEMU incorrectly handled USB Net emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service, or possibly leak\nhost memory bytes (CVE-2016-2538).\n\nHongke Yang discovered that QEMU incorrectly handled NE2000 emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service (CVE-2016-2841).\n\nLing Liu discovered that QEMU incorrectly handled IP checksum routines. An\nattacker inside the guest could use this issue to cause QEMU to crash,\nresulting in a denial of service, or possibly leak host memory bytes\n(CVE-2016-2857).\n\nIt was discovered that QEMU incorrectly handled the PRNG back-end support.\nAn attacker inside the guest could use this issue to cause QEMU to crash,\nresulting in a denial of service (CVE-2016-2858).\n\nWei Xiao and Qinghao Tang discovered that QEMU incorrectly handled access\nin the VGA module. A privileged attacker inside the guest could use this\nissue to cause QEMU to crash, resulting in a denial of service, or possibly\nexecute arbitrary code on the host. In the default installation, when QEMU\nis used with libvirt, attackers would be isolated by the libvirt AppArmor\nprofile (CVE-2016-3710).\n\nZuozhi Fzz discovered that QEMU incorrectly handled access in the VGA\nmodule. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service, or possibly\nexecute arbitrary code on the host. In the default installation, when QEMU\nis used with libvirt, attackers would be isolated by the libvirt AppArmor\nprofile (CVE-2016-3712).\n\nOleksandr Bazhaniuk discovered that QEMU incorrectly handled Luminary\nMicro Stellaris ethernet controller emulation. A remote attacker could use\nthis issue to cause QEMU to crash, resulting in a denial of service\n(CVE-2016-4001).\n\nOleksandr Bazhaniuk discovered that QEMU incorrectly handled MIPSnet\ncontroller emulation. A remote attacker could use this issue to cause QEMU\nto crash, resulting in a denial of service (CVE-2016-4002).\n\nDonghai Zdh discovered that QEMU incorrectly handled the Task Priority\nRegister(TPR). A privileged attacker inside the guest could use this issue\nto possibly leak host memory bytes (CVE-2016-4020).\n\nDu Shaobo discovered that QEMU incorrectly handled USB EHCI emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to consume resources, resulting in a denial of service\n(CVE-2016-4037).\n\nThe qemu package has been updated to version 2.4.1 and patched to fix these\nissues.\n","status":"published","published":"2016-05-18T20:14:22Z","modified":"2026-04-16T06:24:31.660709406Z","updated_at":"2026-11-02T15:49:39.792687Z"},{"id":"openSUSE-SU-2024:10233-1","title":"qemu-2.6.1-1.5 on GA media","description":"These are all security issues fixed in the qemu-2.6.1-1.5 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:31:08.968833Z","updated_at":"2026-11-02T16:58:33.135986Z"},{"id":"openSUSE-SU-2024:10285-1","title":"qemu-linux-user-2.6.1-1.5 on GA media","description":"These are all security issues fixed in the qemu-linux-user-2.6.1-1.5 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:31:03.73343Z","updated_at":"2026-11-02T16:58:33.135986Z"},{"id":"SUSE-SU-2016:1560-1","title":"Security update for qemu","description":"qemu was updated to fix 37 security issues.\n\nThese security issues were fixed:\n- CVE-2016-4439: Avoid OOB access in 53C9X emulation (bsc#980711)\n- CVE-2016-4441: Avoid OOB access in 53C9X emulation (bsc#980723)\n- CVE-2016-4952: Avoid OOB access in Vmware PV SCSI emulation (bsc#981266)\n- CVE-2015-8817: Avoid OOB access in PCI DMA I/O (bsc#969121)\n- CVE-2015-8818: Avoid OOB access in PCI DMA I/O (bsc#969122)\n- CVE-2016-3710: Fixed VGA emulation based OOB access with potential for guest escape (bsc#978158)\n- CVE-2016-3712: Fixed VGa emulation based DOS and OOB read access exploit (bsc#978160)\n- CVE-2016-4037: Fixed USB ehci based DOS (bsc#976109)\n- CVE-2016-2538: Fixed potential OOB access in USB net device emulation (bsc#967969)\n- CVE-2016-2841: Fixed OOB access / hang in ne2000 emulation (bsc#969350)\n- CVE-2016-2858: Avoid potential DOS when using QEMU pseudo random number generator (bsc#970036)\n- CVE-2016-2857: Fixed OOB access when processing IP checksums (bsc#970037)\n- CVE-2016-4001: Fixed OOB access in Stellaris enet emulated nic (bsc#975128)\n- CVE-2016-4002: Fixed OOB access in MIPSnet emulated controller (bsc#975136)\n- CVE-2016-4020: Fixed possible host data leakage to guest from TPR access (bsc#975700)\n- CVE-2015-3214: Fixed OOB read in i8254 PIC (bsc#934069)\n- CVE-2014-9718: Fixed the handling of malformed or short ide PRDTs to avoid any opportunity for guest to cause DoS by abusing that interface (bsc#928393)\n- CVE-2014-3689: Fixed insufficient parameter validation in rectangle functions (bsc#901508)\n- CVE-2014-3615: The VGA emulator in QEMU allowed local guest users to read host memory by setting the display to a high resolution (bsc#895528).\n- CVE-2015-5239: Integer overflow in vnc_client_read() and protocol_client_msg() (bsc#944463).\n- CVE-2015-5745: Buffer overflow in virtio-serial (bsc#940929).\n- CVE-2015-7295: hw/virtio/virtio.c in the Virtual Network Device (virtio-net) support in QEMU, when big or mergeable receive buffers are not supported, allowed remote attackers to cause a denial of service (guest network consumption) via a flood of jumbo frames on the (1) tuntap or (2) macvtap interface (bsc#947159).\n- CVE-2015-7549: PCI null pointer dereferences (bsc#958917).\n- CVE-2015-8504: VNC floating point exception (bsc#958491).\n- CVE-2015-8558: Infinite loop in ehci_advance_state resulting in DoS (bsc#959005).\n- CVE-2015-8567: A guest repeatedly activating a vmxnet3 device can leak host memory (bsc#959386).\n- CVE-2015-8568: A guest repeatedly activating a vmxnet3 device can leak host memory (bsc#959386).\n- CVE-2015-8613: Wrong sized memset in megasas command handler (bsc#961358).\n- CVE-2015-8619: Potential DoS for long HMP sendkey command argument (bsc#960334).\n- CVE-2015-8743: OOB memory access in ne2000 ioport r/w functions (bsc#960725).\n- CVE-2015-8744: Incorrect l2 header validation could have lead to a crash via assert(2) call (bsc#960835).\n- CVE-2015-8745: Reading IMR registers could have lead to a crash via assert(2) call (bsc#960708).\n- CVE-2016-1568: AHCI use-after-free in aio port commands (bsc#961332).\n- CVE-2016-1714: Potential OOB memory access in processing firmware configuration (bsc#961691).\n- CVE-2016-1922: NULL pointer dereference when processing hmp i/o command (bsc#962320).\n- CVE-2016-1981: Potential DoS (infinite loop) in e1000 device emulation by malicious privileged user within guest (bsc#963782).\n- CVE-2016-2198: Malicious privileged guest user were able to cause DoS by writing to read-only EHCI capabilities registers (bsc#964413).\n\nThis non-security issue was fixed\n- bsc#886378: qemu truncates vhd images in virt-rescue\n","status":"published","published":"2016-06-13T07:13:18Z","modified":"2026-02-04T03:44:42.289772Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:1698-1","title":"Security update for kvm","description":"kvm was updated to fix 33 security issues.\n\nThese security issues were fixed:\n- CVE-2016-4439: Avoid OOB access in 53C9X emulation (bsc#980711)\n- CVE-2016-4441: Avoid OOB access in 53C9X emulation (bsc#980723)\n- CVE-2016-3710: Fixed VGA emulation based OOB access with potential for guest escape (bsc#978158)\n- CVE-2016-3712: Fixed VGa emulation based DOS and OOB read access exploit (bsc#978160)\n- CVE-2016-4037: Fixed USB ehci based DOS (bsc#976109) \n- CVE-2016-2538: Fixed potential OOB access in USB net device emulation (bsc#967969)\n- CVE-2016-2841: Fixed OOB access / hang in ne2000 emulation (bsc#969350)\n- CVE-2016-2858: Avoid potential DOS when using QEMU pseudo random number generator (bsc#970036)\n- CVE-2016-2857: Fixed OOB access when processing IP checksums (bsc#970037)\n- CVE-2016-4001: Fixed OOB access in Stellaris enet emulated nic (bsc#975128)\n- CVE-2016-4002: Fixed OOB access in MIPSnet emulated controller (bsc#975136)\n- CVE-2016-4020: Fixed possible host data leakage to guest from TPR access (bsc#975700)\n- CVE-2015-3214: Fixed OOB read in i8254 PIC (bsc#934069)\n- CVE-2014-9718: Fixed the handling of malformed or short ide PRDTs to avoid any opportunity for guest to cause DoS by abusing that interface (bsc#928393)\n- CVE-2014-3689: Fixed insufficient parameter validation in rectangle functions (bsc#901508)\n- CVE-2014-3615: The VGA emulator in QEMU allowed local guest users to read host memory by setting the display to a high resolution (bsc#895528).\n- CVE-2015-5239: Integer overflow in vnc_client_read() and protocol_client_msg() (bsc#944463).\n- CVE-2015-5278: Infinite loop in ne2000_receive() function (bsc#945989).\n- CVE-2015-5279: Heap-based buffer overflow in the ne2000_receive function in hw/net/ne2000.c in QEMU allowed guest OS users to cause a denial of service (instance crash) or possibly execute arbitrary code via vectors related to receiving packets (bsc#945987).\n- CVE-2015-5745: Buffer overflow in virtio-serial (bsc#940929).\n- CVE-2015-6855: hw/ide/core.c in QEMU did not properly restrict the commands accepted by an ATAPI device, which allowed guest users to cause a denial of service or possibly have unspecified other impact via certain IDE commands, as demonstrated by a WIN_READ_NATIVE_MAX command to an empty drive, which triggers a divide-by-zero error and instance crash (bsc#945404).\n- CVE-2015-7295: hw/virtio/virtio.c in the Virtual Network Device (virtio-net) support in QEMU, when big or mergeable receive buffers are not supported, allowed remote attackers to cause a denial of service (guest network consumption) via a flood of jumbo frames on the (1) tuntap or (2) macvtap interface (bsc#947159).\n- CVE-2015-7549: PCI null pointer dereferences (bsc#958917).\n- CVE-2015-8504: VNC floating point exception (bsc#958491).\n- CVE-2015-8558: Infinite loop in ehci_advance_state resulting in DoS (bsc#959005).\n- CVE-2015-8613: Wrong sized memset in megasas command handler (bsc#961358).\n- CVE-2015-8619: Potential DoS for long HMP sendkey command argument (bsc#960334).\n- CVE-2015-8743: OOB memory access in ne2000 ioport r/w functions (bsc#960725).\n- CVE-2016-1568: AHCI use-after-free in aio port commands (bsc#961332).\n- CVE-2016-1714: Potential OOB memory access in processing firmware configuration (bsc#961691).\n- CVE-2016-1922: NULL pointer dereference when processing hmp i/o command (bsc#962320).\n- CVE-2016-1981: Potential DoS (infinite loop) in e1000 device emulation by malicious privileged user within guest (bsc#963782).\n- CVE-2016-2198: Malicious privileged guest user were able to cause DoS by writing to read-only EHCI capabilities registers (bsc#964413).\n\nThis non-security issue was fixed:\n- Fix case of IDE interface needing busy status set before flush (bsc#936132)\n","status":"published","published":"2016-06-28T14:31:01Z","modified":"2026-02-04T03:07:16.951102Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:1703-1","title":"Security update for qemu","description":"qemu was updated to fix 29 security issues.\n\nThese security issues were fixed:\n- CVE-2016-4439: Avoid OOB access in 53C9X emulation (bsc#980711)\n- CVE-2016-4441: Avoid OOB access in 53C9X emulation (bsc#980723)\n- CVE-2016-4952: Avoid OOB access in Vmware PV SCSI emulation (bsc#981266)\n- CVE-2015-8817: Avoid OOB access in PCI dma I/O (bsc#969121)\n- CVE-2015-8818: Avoid OOB access in PCI dma I/O (bsc#969122)\n- CVE-2016-3710: Fixed VGA emulation based OOB access with potential for guest escape (bsc#978158)\n- CVE-2016-3712: Fixed VGa emulation based DOS and OOB read access exploit (bsc#978160)\n- CVE-2016-4037: Fixed USB ehci based DOS (bsc#976109)\n- CVE-2016-2538: Fixed potential OOB access in USB net device emulation (bsc#967969)\n- CVE-2016-2841: Fixed OOB access / hang in ne2000 emulation (bsc#969350)\n- CVE-2016-2858: Avoid potential DOS when using QEMU pseudo random number generator (bsc#970036)\n- CVE-2016-2857: Fixed OOB access when processing IP checksums (bsc#970037)\n- CVE-2016-4001: Fixed OOB access in Stellaris enet emulated nic (bsc#975128)\n- CVE-2016-4002: Fixed OOB access in MIPSnet emulated controller (bsc#975136)\n- CVE-2016-4020: Fixed possible host data leakage to guest from TPR access (bsc#975700)\n- CVE-2016-2197: Prevent AHCI NULL pointer dereference when using FIS CLB engine (bsc#964411)\n- CVE-2015-5745: Buffer overflow in virtio-serial (bsc#940929).\n- CVE-2015-7549: PCI null pointer dereferences (bsc#958917).\n- CVE-2015-8504: VNC floating point exception (bsc#958491).\n- CVE-2015-8558: Infinite loop in ehci_advance_state resulting in DoS (bsc#959005).\n- CVE-2015-8567: A guest repeatedly activating a vmxnet3 device can leak host memory (bsc#959386).\n- CVE-2015-8568: A guest repeatedly activating a vmxnet3 device can leak host memory (bsc#959386).\n- CVE-2015-8613: Wrong sized memset in megasas command handler (bsc#961358).\n- CVE-2015-8619: Potential DoS for long HMP sendkey command argument (bsc#960334).\n- CVE-2015-8743: OOB memory access in ne2000 ioport r/w functions (bsc#960725).\n- CVE-2015-8744: Incorrect l2 header validation could have lead to a crash via assert(2) call (bsc#960835).\n- CVE-2015-8745: Reading IMR registers could have lead to a crash via assert(2) call (bsc#960708).\n- CVE-2016-1568: AHCI use-after-free in aio port commands (bsc#961332).\n- CVE-2016-1714: Potential OOB memory access in processing firmware configuration (bsc#961691).\n- CVE-2016-1922: NULL pointer dereference when processing hmp i/o command (bsc#962320).\n- CVE-2016-1981: Potential DoS (infinite loop) in e1000 device emulation by malicious privileged user within guest (bsc#963782).\n- CVE-2016-2198: Malicious privileged guest user were able to cause DoS by writing to read-only EHCI capabilities registers (bsc#964413).\n\nThis non-security issue was fixed\n- bsc#886378: qemu truncates vhd images in virt-rescue\n","status":"published","published":"2016-06-29T05:47:55Z","modified":"2026-02-04T04:36:14.909397Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:1785-1","title":"Security update for kvm","description":"kvm was updated to fix 33 security issues.\n\nThese security issues were fixed:\n- CVE-2016-4439: Avoid OOB access in 53C9X emulation (bsc#980711)\n- CVE-2016-4441: Avoid OOB access in 53C9X emulation (bsc#980723)\n- CVE-2016-3710: Fixed VGA emulation based OOB access with potential for guest escape (bsc#978158)\n- CVE-2016-3712: Fixed VGa emulation based DOS and OOB read access exploit (bsc#978160)\n- CVE-2016-4037: Fixed USB ehci based DOS (bsc#976109)\n- CVE-2016-2538: Fixed potential OOB access in USB net device emulation (bsc#967969)\n- CVE-2016-2841: Fixed OOB access / hang in ne2000 emulation (bsc#969350)\n- CVE-2016-2858: Avoid potential DOS when using QEMU pseudo random number generator (bsc#970036)\n- CVE-2016-2857: Fixed OOB access when processing IP checksums (bsc#970037)\n- CVE-2016-4001: Fixed OOB access in Stellaris enet emulated nic (bsc#975128)\n- CVE-2016-4002: Fixed OOB access in MIPSnet emulated controller (bsc#975136)\n- CVE-2016-4020: Fixed possible host data leakage to guest from TPR access (bsc#975700)\n- CVE-2015-3214: Fixed OOB read in i8254 PIC (bsc#934069)\n- CVE-2014-9718: Fixed the handling of malformed or short ide PRDTs to avoid any opportunity for guest to cause DoS by abusing that interface (bsc#928393)\n- CVE-2014-3689: Fixed insufficient parameter validation in rectangle functions (bsc#901508)\n- CVE-2014-3615: The VGA emulator in QEMU allowed local guest users to read host memory by setting the display to a high resolution (bsc#895528).\n- CVE-2015-5239: Integer overflow in vnc_client_read() and protocol_client_msg() (bsc#944463).\n- CVE-2015-5278: Infinite loop in ne2000_receive() function (bsc#945989).\n- CVE-2015-5279: Heap-based buffer overflow in the ne2000_receive function in hw/net/ne2000.c in QEMU allowed guest OS users to cause a denial of service (instance crash) or possibly execute arbitrary code via vectors related to receiving packets (bsc#945987).\n- CVE-2015-5745: Buffer overflow in virtio-serial (bsc#940929).\n- CVE-2015-6855: hw/ide/core.c in QEMU did not properly restrict the commands accepted by an ATAPI device, which allowed guest users to cause a denial of service or possibly have unspecified other impact via certain IDE commands, as demonstrated by a WIN_READ_NATIVE_MAX command to an empty drive, which triggers a divide-by-zero error and instance crash (bsc#945404).\n- CVE-2015-7295: hw/virtio/virtio.c in the Virtual Network Device (virtio-net) support in QEMU, when big or mergeable receive buffers are not supported, allowed remote attackers to cause a denial of service (guest network consumption) via a flood of jumbo frames on the (1) tuntap or (2) macvtap interface (bsc#947159).\n- CVE-2015-7549: PCI null pointer dereferences (bsc#958917).\n- CVE-2015-8504: VNC floating point exception (bsc#958491).\n- CVE-2015-8558: Infinite loop in ehci_advance_state resulting in DoS (bsc#959005).\n- CVE-2015-8613: Wrong sized memset in megasas command handler (bsc#961358).\n- CVE-2015-8619: Potential DoS for long HMP sendkey command argument (bsc#960334).\n- CVE-2015-8743: OOB memory access in ne2000 ioport r/w functions (bsc#960725).\n- CVE-2016-1568: AHCI use-after-free in aio port commands (bsc#961332).\n- CVE-2016-1714: Potential OOB memory access in processing firmware configuration (bsc#961691).\n- CVE-2016-1922: NULL pointer dereference when processing hmp i/o command (bsc#962320).\n- CVE-2016-1981: Potential DoS (infinite loop) in e1000 device emulation by malicious privileged user within guest (bsc#963782).\n- CVE-2016-2198: Malicious privileged guest user were able to cause DoS by writing to read-only EHCI capabilities registers (bsc#964413).\n\nThis non-security issue was fixed:\n- Fix case of IDE interface needing busy status set before flush (bsc#936132)\n","status":"published","published":"2016-07-11T11:31:17Z","modified":"2026-02-04T04:04:29.51983Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:2093-1","title":"Security update for xen","description":"This update for xen to version 4.5.3 fixes the several issues.\n\nThese security issues were fixed:\n\n- CVE-2016-6258: Potential privilege escalation in PV guests (XSA-182) (bsc#988675).\n- CVE-2016-6259: Missing SMAP whitelisting in 32-bit exception / event delivery (XSA-183) (bsc#988676).\n- CVE-2016-5337: The megasas_ctrl_get_info function allowed local guest OS administrators to obtain sensitive host memory information via vectors related to reading device control information (bsc#983973).\n- CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions allowed local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the host via vectors related to the information transfer buffer (bsc#983984).\n- CVE-2016-5238: The get_cmd function in hw/scsi/esp.c might have allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via vectors related to reading from the information transfer buffer in non-DMA mode (bsc#982960).\n- CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225).\n- CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggered an out-of-bounds read (bsc#982224).\n- CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl function allowed local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call (bsc#982286).\n- CVE-2016-5105: Stack information leakage while reading configuration (bsc#982024).\n- CVE-2016-5106: Out-of-bounds write while setting controller properties (bsc#982025).\n- CVE-2016-5107: Out-of-bounds read in megasas_lookup_frame() function (bsc#982026).\n- CVE-2016-4963: The libxl device-handling allowed local guest OS users with access to the driver domain to cause a denial of service (management tool confusion) by manipulating information in the backend directories in xenstore (bsc#979670).\n- CVE-2016-4962: The libxl device-handling allowed local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore (bsc#979620).\n- CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data routines (bsc#981276).\n- CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264).\n- CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724).\n- CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716).\n- CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164).\n- CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038).\n- CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188).\n- CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188).\n- CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list (bsc#976111).\n- CVE-2016-4020: The patch_instruction function did not initialize the imm32 variable, which allowed local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR) (bsc#975907).\n- CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130).\n- CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138).\n- bsc#978295: x86 software guest page walk PS bit handling flaw (XSA-176)\n- CVE-2016-5403: virtio: unbounded memory allocation on host via guest leading to DoS (XSA-184) (bsc#990923)\n- CVE-2016-6351: scsi: esp: OOB write access in esp_do_dma (bsc#990843)\n\nThese non-security issues were fixed:\n\n- bsc#986586: Out of memory (oom) during boot on 'modprobe xenblk' (non xen kernel)\n- bsc#900418: Dump cannot be performed on SLES12 XEN\n- bsc#953339: Implement SUSE specific unplug protocol for emulated PCI devices in PVonHVM guests to qemu-xen-upstream\n- bsc#953362: Implement SUSE specific unplug protocol for emulated PCI devices in PVonHVM guests to qemu-xen-upstream\n- bsc#953518: Implement SUSE specific unplug protocol for emulated PCI devices in PVonHVM guests to qemu-xen-upstream\n- bsc#984981: Implement SUSE specific unplug protocol for emulated PCI devices in PVonHVM guests to qemu-xen-upstream\n- bsc#954872: Script block-dmmd not working as expected - libxl: error: libxl_dm.c (Additional fixes)\n- bsc#982695: qemu fails to boot HVM guest from xvda\n- bsc#958848: HVM guest crash at /usr/src/packages/BUILD/xen-4.4.2-testing/obj/default/balloon/balloon.c:407\n- bsc#949889: Fail to install 32-bit paravirt VM under SLES12SP1Beta3 XEN\n- bsc#954872: Script block-dmmd not working as expected - libxl: error: libxl_dm.c (another modification)\n- bsc#961600: Poor performance when Xen HVM domU configured with max memory greater than current memory\n- bsc#963161: Windows VM getting stuck during load while a VF is assigned to it after upgrading to latest maintenance updates\n- bsc#976058: Xen error running simple HVM guest (Post Alpha 2 xen+qemu)\n- bsc#973631: AWS EC2 kdump issue\n- bsc#957986: Indirect descriptors are not compatible with Amazon block backend\n- bsc#964427: Discarding device blocks: failed - Input/output error\n- bsc#985503: Fixed vif-route \n- bsc#978413: PV guest upgrade from SLES11 SP4 to SLES 12 SP2 alpha3 failed \n","status":"published","published":"2016-08-17T12:22:27Z","modified":"2026-02-04T02:40:45.544605Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:2100-1","title":"Security update for xen","description":"This update for xen fixes the several issues.\n\nThese security issues were fixed:\n- CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264).\n- CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188).\n- CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188).\n- CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164).\n- CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038).\n- CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130).\n- CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138).\n- CVE-2016-4020: The patch_instruction function did not initialize the imm32 variable, which allowed local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR) (bsc#975907).\n- CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list (bsc#976111).\n- CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716).\n- CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724).\n- CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225).\n- CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggered an out-of-bounds read (bsc#982224).\n- CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data routines (bsc#981276).\n- CVE-2016-4962: The libxl device-handling allowed local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore (bsc#979620).\n- CVE-2016-4963: The libxl device-handling allowed local guest OS users with access to the driver domain to cause a denial of service (management tool confusion) by manipulating information in the backend directories in xenstore (bsc#979670).\n- CVE-2016-5105: Stack information leakage while reading configuration (bsc#982024).\n- CVE-2016-5106: Out-of-bounds write while setting controller properties (bsc#982025).\n- CVE-2016-5107: Out-of-bounds read in megasas_lookup_frame() function (bsc#982026).\n- CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl function allowed local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call (bsc#982286).\n- CVE-2016-5238: The get_cmd function in hw/scsi/esp.c might have allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via vectors related to reading from the information transfer buffer in non-DMA mode (bsc#982960).\n- CVE-2016-5337: The megasas_ctrl_get_info function allowed local guest OS administrators to obtain sensitive host memory information via vectors related to reading device control information (bsc#983973).\n- CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions allowed local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the host via vectors related to the information transfer buffer (bsc#983984).\n- CVE-2016-6258: Potential privilege escalation in PV guests (XSA-182) (bsc#988675).\n- bsc#978295: x86 software guest page walk PS bit handling flaw (XSA-176)\n- CVE-2016-5403: virtio: unbounded memory allocation on host via guest leading to DoS (XSA-184) (bsc#990923)\n- CVE-2016-6351: scsi: esp: OOB write access in esp_do_dma (bsc#990843)\n\nThese non-security issues were fixed:\n- bsc#954872: Script block-dmmd not working as expected - libxl: error: libxl_dm.c\n- bsc#957986: Indirect descriptors are not compatible with Amazon block backend\n- bsc#958848: HVM guest crash at /usr/src/packages/BUILD/xen-4.4.2-testing/obj/default/balloon/balloon.c:407\n- bsc#961600: Poor performance when Xen HVM domU configured with max memory greater than current memory\n- bsc#963161: Windows VM getting stuck during load while a VF is assigned to it after upgrading to latest maintenance updates\n- bsc#964427: Discarding device blocks: failed - Input/output error\n- bsc#976058: Xen error running simple HVM guest (Post Alpha 2 xen+qemu)\n- bsc#982695: qemu fails to boot HVM guest from xvda\n- bsc#986586: Out of memory (oom) during boot on 'modprobe xenblk' (non xen kernel)\n- bsc#967630: Discrepancy in reported memory size with correction XSA-153 for xend. Additional memory adjustment made.\n- bsc#974912: Persistent performance drop after live-migration using xend tool stack\n- bsc#979035: Restore xm migrate fixes for bsc#955399/ bsc#955399\n- bsc#989235: xen dom0 xm create command only searched /etc/xen instead of /etc/xen/vm\n- Live Migration SLES 11 SP3 to SP4 on AMD: 'xc: error: Couldn't set extended vcpu0 info'\n- bsc#985503: Fixed vif-route\n- bsc#978413: PV guest upgrade from SLES11 SP4 to SLES 12 SP2 alpha3 failed\n","status":"published","published":"2016-08-18T12:48:09Z","modified":"2026-02-04T03:16:00.994297Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:2533-1","title":"Security update for xen","description":"This update for xen fixes several issues.\n\nThese security issues were fixed:\n- CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264).\n- CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188).\n- CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188).\n- CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164)\n- CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038).\n- CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130).\n- CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138).\n- CVE-2016-4020: The patch_instruction function did not initialize the imm32 variable, which allowed local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR) (bsc#975907)\n- CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list (bsc#976111)\n- CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716)\n- CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724)\n- CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225)\n- CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggered an out-of-bounds read (bsc#982224)\n- CVE-2016-4480: The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen did not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might have allowed local guest OS users to gain privileges via a crafted mapping of memory (bsc#978295).\n- CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data routines (bsc#981276)\n- CVE-2016-4962: The libxl device-handling allowed local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore (bsc#979620)\n- CVE-2016-4963: The libxl device-handling allowed local guest OS users with access to the driver domain to cause a denial of service (management tool confusion) by manipulating information in the backend directories in xenstore (bsc#979670)\n- CVE-2016-5105: Stack information leakage while reading configuration (bsc#982024)\n- CVE-2016-5106: Out-of-bounds write while setting controller properties (bsc#982025)\n- CVE-2016-5107: Out-of-bounds read in megasas_lookup_frame() function (bsc#982026)\n- CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl function allowed local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call (bsc#982286)\n- CVE-2016-5238: The get_cmd function in hw/scsi/esp.c might have allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via vectors related to reading from the information transfer buffer in non-DMA mode (bsc#982960)\n- CVE-2016-5337: The megasas_ctrl_get_info function allowed local guest OS administrators to obtain sensitive host memory information via vectors related to reading device control information (bsc#983973)\n- CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions allowed local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the host via vectors related to the information transfer buffer (bsc#983984)\n- CVE-2016-5403: virtio: unbounded memory allocation on host via guest leading to DoS (XSA-184) (bsc#990923)\n- CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries (bsc#988675)\n- CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c, when built with ESP/NCR53C9x controller emulation support, allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or execute arbitrary code on the host via vectors involving DMA read into ESP command buffer (bsc#990843).\n- CVE-2016-6833: A use-after-free issue in the VMWARE VMXNET3 NIC device support allowed privileged user inside guest to crash the Qemu instance resulting in DoS (bsc#994775).\n- CVE-2016-6834: A infinite loop during packet fragmentation in the VMWARE VMXNET3 NIC device support allowed privileged user inside guest to crash the Qemu instance resulting in DoS (bsc#994421).\n- CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC device support, causing an OOB read access (bsc#994625).\n- CVE-2016-6836: VMWARE VMXNET3 NIC device allowed privileged user inside the guest to leak information. It occured while processing transmit(tx) queue, when it reaches the end of packet (bsc#994761).\n- CVE-2016-6888: A integer overflow int the VMWARE VMXNET3 NIC device support, during the initialisation of new packets in the device, could have allowed a privileged user inside guest to crash the Qemu instance resulting in DoS (bsc#994772).\n- CVE-2016-7092: The get_page_from_l3e function in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges via vectors related to L3 recursive pagetables (bsc#995785)\n- CVE-2016-7093: Xen allowed local HVM guest OS administrators to overwrite hypervisor memory and consequently gain host OS privileges by leveraging mishandling of instruction pointer truncation during emulation (bsc#995789)\n- CVE-2016-7094: Buffer overflow in Xen allowed local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update (bsc#995792)\n- CVE-2016-7154: Use-after-free vulnerability in the FIFO event channel code in Xen allowed local guest OS administrators to cause a denial of service (host crash) and possibly execute arbitrary code or obtain sensitive information via an invalid guest frame number (bsc#997731).\n\nThese non-security issues were fixed:\n- bsc#991934: Hypervisor crash in csched_acct\n- bsc#992224: During boot of Xen Hypervisor, failed to get contiguous memory for DMA\n- bsc#970135: New virtualization project clock test randomly fails on Xen \n- bsc#971949: xl: Support (by ignoring) xl migrate --live. xl migrations are always live\n- bsc#990970: Add PMU support for Intel E7-8867 v4 (fam=6, model=79)\n- bsc#985503: vif-route broken\n- bsc#978413: PV guest upgrade from sles11sp4 to sles12sp2 alpha3 failed on sles11sp4 xen host.\n- bsc#986586: Out of memory (oom) during boot on 'modprobe xenblk' (non xen kernel)\n- bsc#953339, bsc#953362, bsc#953518, bsc#984981: Implement SUSE specific unplug protocol for emulated PCI devices in PVonHVM guests to qemu-xen-upstream\n- bsc#958848: HVM guest crash at /usr/src/packages/BUILD/ xen-4.4.2-testing/obj/default/balloon/balloon.c:407\n- bsc#982695: xen-4.5.2 qemu fails to boot HVM guest from xvda \n- bsc#954872: script block-dmmd not working as expected\n- bsc#961600: : poor performance when Xen HVM domU configured with max memory \u003e current memory\n- bsc#979035: Restore xm migrate fixes for bsc#955399/ bsc#955399\n- bsc#963161: Windows VM getting stuck during load while a VF is assigned to it\n- bsc#976058: Xen error running simple HVM guest (Post Alpha 2 xen+qemu)\n- bsc#957986: Indirect descriptors are not compatible with Amazon block backend\n- bsc#973631: AWS EC2 kdump issue\n- bsc#964427: Discarding device blocks failed with input/output error\n","status":"published","published":"2016-10-13T15:12:40Z","modified":"2026-02-04T03:26:55.353348Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"USN-2974-1","title":"qemu, qemu-kvm vulnerabilities","description":"Zuozhi Fzz discovered that QEMU incorrectly handled USB OHCI emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service. (CVE-2016-2391)\n\nQinghao Tang discovered that QEMU incorrectly handled USB Net emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service. (CVE-2016-2392)\n\nQinghao Tang discovered that QEMU incorrectly handled USB Net emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service, or possibly leak\nhost memory bytes. (CVE-2016-2538)\n\nHongke Yang discovered that QEMU incorrectly handled NE2000 emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service. (CVE-2016-2841)\n\nLing Liu discovered that QEMU incorrectly handled IP checksum routines. An\nattacker inside the guest could use this issue to cause QEMU to crash,\nresulting in a denial of service, or possibly leak host memory bytes.\n(CVE-2016-2857)\n\nIt was discovered that QEMU incorrectly handled the PRNG back-end support.\nAn attacker inside the guest could use this issue to cause QEMU to crash,\nresulting in a denial of service. This issue only applied to Ubuntu 14.04\nLTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2016-2858)\n\nWei Xiao and Qinghao Tang discovered that QEMU incorrectly handled access\nin the VGA module. A privileged attacker inside the guest could use this\nissue to cause QEMU to crash, resulting in a denial of service, or possibly\nexecute arbitrary code on the host. In the default installation, when QEMU\nis used with libvirt, attackers would be isolated by the libvirt AppArmor\nprofile. (CVE-2016-3710)\n\nZuozhi Fzz discovered that QEMU incorrectly handled access in the VGA\nmodule. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service, or possibly\nexecute arbitrary code on the host. In the default installation, when QEMU\nis used with libvirt, attackers would be isolated by the libvirt AppArmor\nprofile. (CVE-2016-3712)\n\nOleksandr Bazhaniuk discovered that QEMU incorrectly handled Luminary\nMicro Stellaris ethernet controller emulation. A remote attacker could use\nthis issue to cause QEMU to crash, resulting in a denial of service.\n(CVE-2016-4001)\n\nOleksandr Bazhaniuk discovered that QEMU incorrectly handled MIPSnet\ncontroller emulation. A remote attacker could use this issue to cause QEMU\nto crash, resulting in a denial of service. (CVE-2016-4002)\n\nDonghai Zdh discovered that QEMU incorrectly handled the Task Priority\nRegister(TPR). A privileged attacker inside the guest could use this issue\nto possibly leak host memory bytes. This issue only applied to Ubuntu 14.04\nLTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2016-4020)\n\nDu Shaobo discovered that QEMU incorrectly handled USB EHCI emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to consume resources, resulting in a denial of service.\n(CVE-2016-4037)\n","status":"published","published":"2016-05-12T14:33:38Z","modified":"2026-02-10T04:40:59Z","updated_at":"2026-11-02T16:58:10.303275Z"}]}}