{"id":"CVE-2016-6835","aliases":["DEBIAN-CVE-2016-6835","DLA-1497-1","EUVD-2016-7720","GHSA-qv57-784w-q593","RHSA-2017:2392","SUSE-SU-2016:2473-1","SUSE-SU-2016:2507-1","SUSE-SU-2016:2533-1","SUSE-SU-2017:2946-1","SUSE-SU-2017:2969-1","UBUNTU-CVE-2016-6835","USN-3125-1"],"status":"published","title":"The vmxnet_tx_pkt_parse_headers function in hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator)...","description":"The vmxnet_tx_pkt_parse_headers function in hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (buffer over-read) by leveraging failure to check IP header length.","severity":{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00392,"percentile":0.33643,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2016-08-18T00:00:00Z","modified":"2026-10-24T10:30:32Z","fixes":[{"ecosystem":"Debian:12","package":"qemu","fixed_in":["1:2.6+dfsg-3.1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"qemu","fixed_in":["1:2.6+dfsg-3.1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"qemu","fixed_in":["1:2.6+dfsg-3.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"qemu","fixed_in":["2.0.0+dfsg-2ubuntu1.30"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"qemu","fixed_in":["1:2.5+dfsg-5ubuntu10.6"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.6+dfsg-3.1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.6+dfsg-3.1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.6+dfsg-3.1"}]}]},{"source":"osv","ecosystem":"Debian:8","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.1+dfsg-12+deb8u7"}]}],"versions":["1:2.1+dfsg-11","1:2.1+dfsg-12","1:2.1+dfsg-12+deb8u1","1:2.1+dfsg-12+deb8u2","1:2.1+dfsg-12+deb8u3","1:2.1+dfsg-12+deb8u4","1:2.1+dfsg-12+deb8u4~bpo70+1","1:2.1+dfsg-12+deb8u5","1:2.1+dfsg-12+deb8u5a","1:2.1+dfsg-12+deb8u5a~bpo70+1","1:2.1+dfsg-12+deb8u6","1:2.1+dfsg-12~bpo70+1"],"bundled":52},{"source":"osv","ecosystem":"Red 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hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (buffer over-read) by leveraging failure to check IP header length.","status":"published","published":"2022-05-13T01:14:30Z","modified":"2023-02-02T21:33:51Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T14:52:47.451891Z"}],"nvd":[{"id":"CVE-2016-6835","description":"The vmxnet_tx_pkt_parse_headers function in hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (buffer over-read) by leveraging failure to check IP header length.","status":"published","published":"2016-12-10T00:59:06.73Z","modified":"2026-06-17T00:51:51.643Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:03:32.79141Z"}],"osv":[{"id":"CVE-2016-6835","description":"The vmxnet_tx_pkt_parse_headers function in hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (buffer over-read) by leveraging failure to check IP header length.","status":"published","published":"2016-12-10T00:59:06.73Z","modified":"2026-10-24T10:30:32.581156565Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:02.776224Z"},{"id":"DEBIAN-CVE-2016-6835","description":"The vmxnet_tx_pkt_parse_headers function in hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (buffer over-read) by leveraging failure to check IP header length.","status":"published","published":"2016-12-10T00:59:06.73Z","modified":"2026-09-22T07:02:12.689988289Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:27.910042Z"},{"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":"UBUNTU-CVE-2016-6835","description":"The vmxnet_tx_pkt_parse_headers function in hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (buffer over-read) by leveraging failure to check IP header length.","status":"published","published":"2016-08-18T00:00:00Z","modified":"2026-02-04T03:43:29.644254Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"},{"version":"3.0","score":6,"vector":"CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:12.642042Z"},{"id":"DLA-1497-1","title":"qemu - security update","status":"published","published":"2018-09-06T00:00:00Z","modified":"2026-03-09T01:23:01.174268Z","updated_at":"2026-11-02T15:46:09.777694Z"},{"id":"SUSE-SU-2016:2473-1","title":"Security update for xen","description":"This update for xen fixes several issues.\n\nThese security issues were fixed:\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-2016-6836: Information leakage in vmxnet3_complete_packet (bsc#994761).\n- CVE-2016-6888: Integer overflow in packet initialisation in VMXNET3 device driver. Aprivileged user inside guest c... (bsc#994772).\n- CVE-2016-6833: Use after free while writing (bsc#994775).\n- CVE-2016-6835: Buffer overflow in vmxnet_tx_pkt_parse_headers() in vmxnet3 deviceemulation. (bsc#994625).\n- CVE-2016-6834: An infinite loop during packet fragmentation (bsc#994421).\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-2016-6259: Xen did not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allowed local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check (bsc#988676).\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#955104: Virsh reports error 'one or more references were leaked after disconnect from hypervisor' when 'virsh save' failed due to 'no response from client after 6 keepalive messages'\n- bsc#959552: Migration of HVM guest leads into libvirt segmentation fault\n- bsc#993665: Migration of xen guests finishes in: One or more references were leaked after disconnect from the hypervisor\n- bsc#959330: Guest migrations using virsh results in error 'Internal error: received hangup / error event on socket'\n- bsc#990500: VM virsh migration fails with keepalive error: ':virKeepAliveTimerInternal:143 : No response from client'\n- bsc#953518: Unplug also SCSI disks in qemu-xen-traditional for upstream unplug protocol\n- bsc#953518: xen_platform: unplug also SCSI disks in qemu-xen\n- bsc#971949: xl: Support (by ignoring) xl migrate --live. xl migrations are always live\n- bsc#970135: New virtualization project clock test randomly fails on Xen\n- bsc#990970: Add PMU support for Intel E7-8867 v4 (fam=6, model=79)\n","status":"published","published":"2016-10-07T09:05:05Z","modified":"2026-02-04T03:47:43.840925Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:2507-1","title":"Security update for xen","description":"This update for xen fixes several issues.\n\nThese security issues were fixed:\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- 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-2016-6833: 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-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC device support, causing an OOB read access (bsc#994625)\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-2016-6258: 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\nThese non-security issues were fixed:\n- bsc#993507: virsh detach-disk failing to detach disk\n- bsc#991934: Xen 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#994136: Unplug also SCSI disks in qemu-xen-traditional for upstream unplug protocol\n- bsc#994136: xen_platform: unplug also SCSI disks in qemu-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#966467: Live Migration SLES 11 SP3 to SP4 on AMD\n","status":"published","published":"2016-10-12T09:34:10Z","modified":"2026-02-04T04:11:40.537088Z","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":"SUSE-SU-2017:2946-1","title":"Security update for qemu","description":"This update for qemu fixes several issues.\n\nThese security issues were fixed:\n\n- CVE-2017-10911: The make_response function in the Linux kernel allowed guest OS users to obtain sensitive information from host OS (or other guest OS) kernel memory by leveraging the copying of uninitialized padding fields in Xen block-interface response structures (bsc#1057378).\n- CVE-2017-12809: The IDE disk and CD/DVD-ROM Emulator support allowed local guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process crash) by flushing an empty CDROM device drive (bsc#1054724).\n- CVE-2017-15289: The mode4and5 write functions allowed local OS guest privileged users to cause a denial of service (out-of-bounds write access and Qemu process crash) via vectors related to dst calculation (bsc#1063122)\n- CVE-2017-15038: Race condition in the v9fs_xattrwalk function local guest OS users to obtain sensitive information from host heap memory via vectors related to reading extended attributes (bsc#1062069)\n- CVE-2017-14167: Integer overflow in the load_multiboot function allowed local guest OS users to execute arbitrary code on the host via crafted multiboot header address values, which trigger an out-of-bounds write (bsc#1057585)\n- CVE-2017-11434: The dhcp_decode function in slirp/bootp.c allowed local guest OS users to cause a denial of service (out-of-bounds read) via a crafted DHCP options string (bsc#1049381)\n- CVE-2017-11334: The address_space_write_continue function allowed local guest OS privileged users to cause a denial of service (out-of-bounds access and guest instance crash) by leveraging use of qemu_map_ram_ptr to access guest ram block area (bsc#1048902)\n- CVE-2017-13672: The VGA display emulator support allowed local guest OS privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors involving display update (bsc#1056334)\n- CVE-2017-5973: A infinite loop while doing control transfer in xhci_kick_epctx allowed privileged user inside the guest to crash the host process resulting in DoS (bsc#1025109)\n- CVE-2017-5987: The sdhci_sdma_transfer_multi_blocks function in hw/sd/sdhci.c allowed local OS guest privileged users to cause a denial of service (infinite loop and QEMU process crash) via vectors involving the transfer mode register during multi block transfer (bsc#1025311)\n- CVE-2017-6505: The ohci_service_ed_list function allowed local guest OS users to cause a denial of service (infinite loop) via vectors involving the number of link endpoint list descriptors (bsc#1028184)\n- CVE-2016-9603: A privileged user within the guest VM could have caused a heap overflow in the device model process, potentially escalating their privileges to that of the device model process (bsc#1028656)\n- CVE-2017-7718: hw/display/cirrus_vga_rop.h allowed local guest OS privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors related to copying VGA data via the cirrus_bitblt_rop_fwd_transp_ and cirrus_bitblt_rop_fwd_ functions (bsc#1034908)\n- CVE-2017-7980: An out-of-bounds r/w access issues in the Cirrus CLGD 54xx VGA Emulator support allowed privileged user inside guest to use this flaw to crash the Qemu process resulting in DoS or potentially execute arbitrary code on a host with privileges of Qemu process on the host (bsc#1035406)\n- CVE-2017-8112: hw/scsi/vmw_pvscsi.c allowed local guest OS privileged users to cause a denial of service (infinite loop and CPU consumption) via the message ring page count (bsc#1036211)\n- CVE-2017-9375: The USB xHCI controller emulator support was vulnerable to an infinite recursive call loop issue, which allowed a privileged user inside guest to crash the Qemu process resulting in DoS (bsc#1042800)\n- CVE-2017-9374: Missing free of 's-\u003eipacket', causes a host memory leak, allowing for DoS (bsc#1043073)\n- CVE-2017-9373: The IDE AHCI Emulation support was vulnerable to a host memory leakage issue, which allowed a privileged user inside guest to leak host memory resulting in DoS (bsc#1042801)\n- CVE-2017-9330: USB OHCI Emulation in qemu allowed local guest OS users to cause a denial of service (infinite loop) by leveraging an incorrect return value (bsc#1042159)\n- CVE-2017-8379: Memory leak in the keyboard input event handlers support allowed local guest OS privileged users to cause a denial of service (host memory consumption) by rapidly generating large keyboard events (bsc#1037334)\n- CVE-2017-8309: Memory leak in the audio/audio.c allowed remote attackers to cause a denial of service (memory consumption) by repeatedly starting and stopping audio capture (bsc#1037242)\n- CVE-2017-8380: The MegaRAID SAS 8708EM2 Host Bus Adapter emulation support was vulnerable to an out-of-bounds read access issue which allowed a privileged user inside guest to read host memory resulting in DoS (bsc#1037336)\n- CVE-2017-7493: The VirtFS, host directory sharing via Plan 9 File System(9pfs) support, was vulnerable to an improper access control issue. It could occur while accessing virtfs metadata files in mapped-file security mode. A guest user could have used this flaw to escalate their privileges inside guest (bsc#1039495)\n- CVE-2016-9602: The VirtFS host directory sharing via Plan 9 File System(9pfs) support was vulnerable to an improper link following issue which allowed a privileged user inside guest to access host file system beyond the shared folder and potentially escalating their privileges on a host (bsc#1020427)\n- CVE-2017-5579: The 16550A UART serial device emulation support was vulnerable to a memory leakage issue allowing a privileged user to cause a DoS and/or potentially crash the Qemu process on the host (bsc#1021741)\n- CVE-2017-9503: The MegaRAID SAS 8708EM2 Host Bus Adapter emulation support was vulnerable to a null pointer dereference issue which allowed a privileged user inside guest to crash the Qemu process on the host resulting in DoS (bsc#1043296)\n- CVE-2017-10664: qemu-nbd did not ignore SIGPIPE, which allowed remote attackers to cause a denial of service (daemon crash) by disconnecting during a server-to-client reply attempt (bsc#1046636)\n- CVE-2017-10806: Stack-based buffer overflow allowed local guest OS users to cause a denial of service (QEMU process crash) via vectors related to logging debug messages (bsc#1047674)\n- CVE-2016-9602: The VirtFS host directory sharing via Plan 9 File System(9pfs) support was vulnerable to an improper link following issue which allowed a privileged user inside guest to access host file system beyond the shared folder and potentially escalating their privileges on a host (bsc#1020427)\n- CVE-2017-7377: The v9fs_create and v9fs_lcreate functions in hw/9pfs/9p.c allowed local guest OS privileged users to cause a denial of service (file descriptor or memory consumption) via vectors related to an already in-use fid (bsc#1032075)\n- CVE-2017-8086: A memory leak in the v9fs_list_xattr function in hw/9pfs/9p-xattr.c allowed local guest OS privileged users to cause a denial of service (memory consumption) via vectors involving the orig_value variable (bsc#1035950)\n- CVE-2017-7471: The VirtFS host directory sharing via Plan 9 File System(9pfs) support was vulnerable to an improper access control issue which allowed a privileged user inside guest to access host file system beyond the shared folder and potentially escalating their privileges on a host (bsc#1034866)\n- CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC device support, causing an OOB read access (bsc#994605)\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#994418)\n- Fix privilege escalation in TCG mode (bsc#1030624)\n\nThis non-security issue was fixed:\n\n- Fix regression introduced by recent virtfs security fixes (bsc#1045035)\n","status":"published","published":"2017-11-08T07:48:24Z","modified":"2025-05-02T04:05:29.049586Z","updated_at":"2026-11-02T15:53:44.209561Z"},{"id":"SUSE-SU-2017:2969-1","title":"Security update for qemu","description":"This update for qemu fixes several issues.\n\nThese security issues were fixed:\n\n- CVE-2017-15289: The mode4and5 write functions allowed local OS guest privileged users to cause a denial of service (out-of-bounds write access and Qemu process crash) via vectors related to dst calculation (bsc#1063122)\n- CVE-2017-2633: The VNC display driver support was vulnerable to an out-of-bounds memory access issue. A user/process inside guest could use this flaw to cause DoS (bsc#1026612)\n- CVE-2017-15038: Race condition in the v9fs_xattrwalk function local guest OS users to obtain sensitive information from host heap memory via vectors related to reading extended attributes (bsc#1062069)\n- CVE-2017-14167: Integer overflow in the load_multiboot function allowed local guest OS users to execute arbitrary code on the host via crafted multiboot header address values, which trigger an out-of-bounds write (bsc#1057585)\n- CVE-2017-11434: The dhcp_decode function in slirp/bootp.c allowed local guest OS users to cause a denial of service (out-of-bounds read) via a crafted DHCP options string (bsc#1049381)\n- CVE-2017-11334: The address_space_write_continue function allowed local guest OS privileged users to cause a denial of service (out-of-bounds access and guest instance crash) by leveraging use of qemu_map_ram_ptr to access guest ram block area (bsc#1048902)\n- CVE-2017-13672: The VGA display emulator support allowed local guest OS privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors involving display update (bsc#1056334)\n- CVE-2017-5973: A infinite loop while doing control transfer in xhci_kick_epctx allowed privileged user inside the guest to crash the host process resulting in DoS (bsc#1025109)\n- CVE-2017-5987: The sdhci_sdma_transfer_multi_blocks function in hw/sd/sdhci.c allowed local OS guest privileged users to cause a denial of service (infinite loop and QEMU process crash) via vectors involving the transfer mode register during multi block transfer (bsc#1025311)\n- CVE-2017-6505: The ohci_service_ed_list function allowed local guest OS users to cause a denial of service (infinite loop) via vectors involving the number of link endpoint list descriptors (bsc#1028184)\n- CVE-2016-9603: A privileged user within the guest VM could have caused a heap overflow in the device model process, potentially escalating their privileges to that of the device model process (bsc#1028656)\n- CVE-2017-7718: hw/display/cirrus_vga_rop.h allowed local guest OS privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors related to copying VGA data via the cirrus_bitblt_rop_fwd_transp_ and cirrus_bitblt_rop_fwd_ functions (bsc#1034908)\n- CVE-2017-7980: An out-of-bounds r/w access issues in the Cirrus CLGD 54xx VGA Emulator support allowed privileged user inside guest to use this flaw to crash the Qemu process resulting in DoS or potentially execute arbitrary code on a host with privileges of Qemu process on the host (bsc#1035406)\n- CVE-2017-8112: hw/scsi/vmw_pvscsi.c allowed local guest OS privileged users to cause a denial of service (infinite loop and CPU consumption) via the message ring page count (bsc#1036211)\n- CVE-2017-9375: The USB xHCI controller emulator support was vulnerable to an infinite recursive call loop issue, which allowed a privileged user inside guest to crash the Qemu process resulting in DoS (bsc#1042800)\n- CVE-2017-9373: The IDE AHCI Emulation support was vulnerable to a host memory leakage issue, which allowed a privileged user inside guest to leak host memory resulting in DoS (bsc#1042801)\n- CVE-2017-9330: USB OHCI Emulation in qemu allowed local guest OS users to cause a denial of service (infinite loop) by leveraging an incorrect return value (bsc#1042159)\n- CVE-2017-8309: Memory leak in the audio/audio.c allowed remote attackers to cause a denial of service (memory consumption) by repeatedly starting and stopping audio capture (bsc#1037242)\n- CVE-2017-7493: The VirtFS, host directory sharing via Plan 9 File System(9pfs) support, was vulnerable to an improper access control issue. It could occur while accessing virtfs metadata files in mapped-file security mode. A guest user could have used this flaw to escalate their privileges inside guest (bsc#1039495)\n- CVE-2016-9602: The VirtFS host directory sharing via Plan 9 File System(9pfs) support was vulnerable to an improper link following issue which allowed a privileged user inside guest to access host file system beyond the shared folder and potentially escalating their privileges on a host (bsc#1020427)\n- CVE-2017-5579: The 16550A UART serial device emulation support was vulnerable to a memory leakage issue allowing a privileged user to cause a DoS and/or potentially crash the Qemu process on the host (bsc#1021741)\n- CVE-2017-9503: The MegaRAID SAS 8708EM2 Host Bus Adapter emulation support was vulnerable to a null pointer dereference issue which allowed a privileged user inside guest to crash the Qemu process on the host resulting in DoS (bsc#1043296)\n- CVE-2017-10664: qemu-nbd did not ignore SIGPIPE, which allowed remote attackers to cause a denial of service (daemon crash) by disconnecting during a server-to-client reply attempt (bsc#1046636)\n- CVE-2017-10806: Stack-based buffer overflow allowed local guest OS users to cause a denial of service (QEMU process crash) via vectors related to logging debug messages (bsc#1047674)\n- CVE-2016-9602: The VirtFS host directory sharing via Plan 9 File System(9pfs) support was vulnerable to an improper link following issue which allowed a privileged user inside guest to access host file system beyond the shared folder and potentially escalating their privileges on a host (bsc#1020427)\n- CVE-2017-7377: The v9fs_create and v9fs_lcreate functions in hw/9pfs/9p.c allowed local guest OS privileged users to cause a denial of service (file descriptor or memory consumption) via vectors related to an already in-use fid (bsc#1032075)\n- CVE-2017-8086: A memory leak in the v9fs_list_xattr function in hw/9pfs/9p-xattr.c allowed local guest OS privileged users to cause a denial of service (memory consumption) via vectors involving the orig_value variable (bsc#1035950)\n- CVE-2017-7471: The VirtFS host directory sharing via Plan 9 File System(9pfs) support was vulnerable to an improper access control issue which allowed a privileged user inside guest to access host file system beyond the shared folder and potentially escalating their privileges on a host (bsc#1034866)\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#994418)\n- CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC device support, causing an OOB read access (bsc#994605)\n- Fix privilege escalation in TCG mode (bsc#1030624)\n\nThis non-security issue wsa fixed:\n\n* bsc#1045035: Fix regression introduced by former virtfs security fixes \n","status":"published","published":"2017-11-09T15:17:28Z","modified":"2026-02-04T03:30:24.008774Z","updated_at":"2026-11-02T15:53:44.209561Z"},{"id":"USN-3125-1","title":"qemu, qemu-kvm vulnerabilities","description":"Zhenhao Hong discovered that QEMU incorrectly handled the Virtio module. A\nprivileged attacker inside the guest could use this issue to cause QEMU to\nconsume resources, resulting in a denial of service. (CVE-2016-5403)\n\nLi Qiang discovered that QEMU incorrectly handled VMWARE VMXNET3 network\ncard emulation support. A privileged attacker inside the guest could use\nthis issue to cause QEMU to crash, resulting in a denial of service. This\nissue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10.\n(CVE-2016-6833, CVE-2016-6834, CVE-2016-6888)\n\nLi Qiang discovered that QEMU incorrectly handled VMWARE VMXNET3 network\ncard emulation support. A privileged attacker inside the guest could use\nthis issue to cause QEMU to crash, resulting in a denial of service, or\npossibly execute arbitrary code on the host. In the default installation,\nwhen QEMU is used with libvirt, attackers would be isolated by the libvirt\nAppArmor profile. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04\nLTS and Ubuntu 16.10. (CVE-2016-6835)\n\nLi Qiang discovered that QEMU incorrectly handled VMWARE VMXNET3 network\ncard emulation support. A privileged attacker inside the guest could use\nthis issue to possibly to obtain sensitive host memory. This issue only\naffected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10.\n(CVE-2016-6836)\n\nFelix Wilhelm discovered that QEMU incorrectly handled Plan 9 File System\n(9pfs) support. A privileged attacker inside the guest could use this issue\nto possibly to obtain sensitive host files. (CVE-2016-7116)\n\nLi Qiang and Tom Victor discovered that QEMU incorrectly handled VMWARE\nPVSCSI paravirtual SCSI bus emulation support. A privileged attacker inside\nthe guest could use this issue to cause QEMU to crash, resulting in a\ndenial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04\nLTS and Ubuntu 16.10. (CVE-2016-7155)\n\nLi Qiang discovered that QEMU incorrectly handled VMWARE PVSCSI paravirtual\nSCSI bus emulation support. A privileged attacker inside the guest could\nuse this issue to cause QEMU to crash, resulting in a denial of service.\nThis issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu\n16.10. (CVE-2016-7156, CVE-2016-7421)\n\nTom Victor discovered that QEMU incorrectly handled LSI SAS1068 host bus\nemulation support. A privileged attacker inside the guest could use this\nissue to cause QEMU to crash, resulting in a denial of service.\nThis issue only affected Ubuntu 16.10. (CVE-2016-7157)\n\nHu Chaojian discovered that QEMU incorrectly handled xlnx.xps-ethernetlite\nemulation support. 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-2016-7161)\n\nQinghao Tang and Li Qiang discovered that QEMU incorrectly handled the\nVMWare VGA module. A privileged attacker inside the guest could use this\nissue to cause QEMU to crash, resulting in a denial of service.\n(CVE-2016-7170)\n\nQinghao Tang and Zhenhao Hong discovered that QEMU incorrectly handled the\nVirtio module. A privileged attacker inside the guest could use this issue\nto cause QEMU to crash, resulting in a denial of service. This issue only\naffected Ubuntu 16.10. (CVE-2016-7422)\n\nLi Qiang discovered that QEMU incorrectly handled LSI SAS1068 host bus\nemulation support. A privileged attacker inside the guest could use this\nissue to cause QEMU to crash, resulting in a denial of service.\nThis issue only affected Ubuntu 16.10. (CVE-2016-7423)\n\nLi Qiang discovered that QEMU incorrectly handled USB xHCI controller\nemulation support. A privileged attacker inside the guest could use this\nissue to cause QEMU to crash, resulting in a denial of service.\nThis issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7466)\n\nLi Qiang discovered that QEMU incorrectly handled ColdFire Fast Ethernet\nController emulation support. A privileged attacker inside the guest could\nuse this issue to cause QEMU to crash, resulting in a denial of service.\n(CVE-2016-7908)\n\nLi Qiang discovered that QEMU incorrectly handled AMD PC-Net II emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service. (CVE-2016-7909)\n\nLi Qiang discovered that QEMU incorrectly handled the Virtio GPU support. A\nprivileged attacker inside the guest could use this issue to cause QEMU to\nconsume resources, resulting in a denial of service. This issue only\naffected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7994)\n\nLi Qiang 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. This\nissue only affected Ubuntu 16.10. (CVE-2016-7995)\n\nLi Qiang discovered that QEMU incorrectly handled USB xHCI controller\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service. This issue only\naffected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10.\n(CVE-2016-8576)\n\nLi Qiang discovered that QEMU incorrectly handled Plan 9 File System (9pfs)\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service. This issue only\naffected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10.\n(CVE-2016-8577, CVE-2016-8578)\n\nIt was discovered that QEMU incorrectly handled Rocker switch emulation\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to crash, resulting in a denial of service. This issue only\naffected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-8668)\n\nIt was discovered that QEMU incorrectly handled Intel HDA controller\nemulation support. A privileged attacker inside the guest could use this\nissue to cause QEMU to consume resources, resulting in a denial of service.\n(CVE-2016-8909)\n\nAndrew Henderson discovered that QEMU incorrectly handled RTL8139 ethernet\ncontroller emulation support. A privileged attacker inside the guest could\nuse this issue to cause QEMU to consume resources, resulting in a denial of\nservice. (CVE-2016-8910)\n\nLi Qiang discovered that QEMU incorrectly handled Intel i8255x ethernet\ncontroller emulation support. A privileged attacker inside the guest could\nuse this issue to cause QEMU to consume resources, resulting in a denial of\nservice. (CVE-2016-9101)\n\nLi Qiang discovered that QEMU incorrectly handled Plan 9 File System (9pfs)\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-2016-9102, CVE-2016-9104, CVE-2016-9105)\n\nLi Qiang discovered that QEMU incorrectly handled Plan 9 File System (9pfs)\nsupport. A privileged attacker inside the guest could use this issue to\npossibly to obtain sensitive host memory. (CVE-2016-9103)\n\nLi Qiang discovered that QEMU incorrectly handled Plan 9 File System (9pfs)\nsupport. A privileged attacker inside the guest could use this issue to\ncause QEMU to consume resources, resulting in a denial of service. This\nissue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10.\n(CVE-2016-9106)\n","status":"published","published":"2016-11-09T18:30:00Z","modified":"2026-02-10T04:41:03Z","updated_at":"2026-11-02T16:58:10.303275Z"}]}}