{"id":"CVE-2017-12188","aliases":["DEBIAN-CVE-2017-12188","EUVD-2017-3763","GHSA-q7q6-h2q3-86p9","MGASA-2018-0062","MGASA-2018-0063","MGASA-2018-0064","RHSA-2018:0395","RHSA-2018:0412","UBUNTU-CVE-2017-12188","USN-3484-2","USN-3484-3","USN-3488-1"],"status":"published","title":"arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does...","description":"arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an \"MMU potential stack buffer overrun.\"","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00441,"percentile":0.38618,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-121","CWE-22"],"published":"2017-10-11T00:00:00Z","modified":"2026-09-01T20:03:42Z","fixes":[{"ecosystem":"Debian:12","package":"linux","fixed_in":["4.13.4-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"linux","fixed_in":["4.13.4-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"linux","fixed_in":["4.13.4-2"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"linux-azure","fixed_in":["4.11.0-1015.15"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"linux-gcp","fixed_in":["4.10.0-1009.9"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"linux-hwe","fixed_in":["4.13.0-32.35~16.04.1","4.10.0-40.44~16.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.13.4-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.13.4-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.13.4-2"}]}]},{"source":"osv","ecosystem":"Mageia:6","package":"kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.10-1.mga6"}]}],"bundled":26},{"source":"osv","ecosystem":"Mageia:6","package":"kernel-userspace-headers","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.10-1.mga6"}]}],"bundled":26},{"source":"osv","ecosystem":"Mageia:6","package":"kmod-vboxadditions","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.2.2-5.mga6"}]}],"bundled":26},{"source":"osv","ecosystem":"Mageia:6","package":"kmod-virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.2.2-5.mga6"}]}],"bundled":26},{"source":"osv","ecosystem":"Mageia:6","package":"kmod-xtables-addons","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.13-8.mga6"}]}],"bundled":26},{"source":"osv","ecosystem":"Mageia:6","package":"wireguard-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20171221-1.mga6"}]}],"bundled":26},{"source":"osv","ecosystem":"Mageia:6","package":"kernel-tmb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.10-1.mga6"}]}],"bundled":26},{"source":"osv","ecosystem":"Mageia:6","package":"kernel-linus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.10-1.mga6"}]}],"bundled":25},{"source":"osv","ecosystem":"Red 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Advisory","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-12188","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2017-12188","tags":["report"]},{"url":"https://patchwork.kernel.org/patch/9996579"},{"url":"https://patchwork.kernel.org/patch/9996587"},{"url":"https://github.com/advisories/GHSA-q7q6-h2q3-86p9"},{"url":"https://security-tracker.debian.org/tracker/CVE-2017-12188","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2018-0062.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=22166","tags":["report"]},{"url":"https://kernelnewbies.org/Linux_4.10","tags":["web"]},{"url":"https://kernelnewbies.org/Linux_4.11","tags":["web"]},{"url":"https://kernelnewbies.org/Linux_4.12","tags":["web"]},{"url":"https://kernelnewbies.org/Linux_4.13","tags":["web"]},{"url":"https://kernelnewbies.org/Linux_4.14","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.1","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.2","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.3","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.4","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.5","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.6","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.7","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.9","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.10","tags":["web"]},{"url":"https://www.wireguard.com/","tags":["web"]},{"url":"https://advisories.mageia.org/MGASA-2018-0063.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=22268","tags":["report"]},{"url":"https://advisories.mageia.org/MGASA-2018-0064.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=22269","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/#important","tags":["article"]},{"url":"https://access.redhat.com/articles/3368501","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1464473","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2018/rhsa-2018_0395.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2017-7518","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-7518","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-7518","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-12188","tags":["advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1537671","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2018/rhsa-2018_0412.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2017-18270","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1580979","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-18270","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18270","tags":["advisory"]},{"url":"http://kernsec.org/pipermail/linux-security-module-archive/2017-September/003318.html","tags":["article"]},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=237bbd29f7a049d310d907f4b2716a7feef9abf3","tags":["article"]},{"url":"https://ubuntu.com/security/CVE-2017-12188","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-3484-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-3484-2","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-3488-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-3487-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-3484-3","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2017-12188","description":"arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an \"MMU potential stack buffer overrun.\"","status":"published","published":"2017-10-11T15:00:00Z","modified":"2024-08-05T18:28:16.694Z","cwes":["CWE-121"],"updated_at":"2026-11-02T14:33:17.59533Z"}],"euvd":[{"id":"EUVD-2017-3763","description":"arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an \"MMU potential stack buffer overrun.\"","status":"published","published":"2017-10-11T15:00:00Z","modified":"2024-08-05T18:28:16Z","updated_at":"2026-11-03T02:23:22.23661Z"}],"ghsa":[{"id":"GHSA-q7q6-h2q3-86p9","title":"arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does...","description":"arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an \"MMU potential stack buffer overrun.\"","status":"published","published":"2022-05-14T03:39:41Z","modified":"2024-04-02T18:31:16Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-22","CWE-121"],"updated_at":"2026-11-02T14:55:46.249342Z"}],"nvd":[{"id":"CVE-2017-12188","description":"arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an \"MMU potential stack buffer overrun.\"","status":"published","published":"2017-10-11T15:29:00.18Z","modified":"2026-06-17T01:02:52.017Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.9,"vector":"AV:L/AC:M/Au:N/C:C/I:C/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-121","CWE-22"],"updated_at":"2026-11-02T14:04:01.734197Z"}],"osv":[{"id":"CVE-2017-12188","description":"arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an \"MMU potential stack buffer overrun.\"","status":"published","published":"2017-10-11T15:29:00.18Z","modified":"2026-04-16T06:26:27.505929061Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:04.159616Z"},{"id":"DEBIAN-CVE-2017-12188","description":"arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an \"MMU potential stack buffer overrun.\"","status":"published","published":"2017-10-11T15:29:00.18Z","modified":"2026-09-01T20:03:42.08080624Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:28.50097Z"},{"id":"RHSA-2018:0395","title":"Red Hat Security Advisory: kernel security and bug fix update","status":"published","published":"2024-09-13T13:40:49Z","modified":"2026-07-01T10:03:25Z","cvss":[{"version":"3.0","score":7.6,"vector":"CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:04.822845Z"},{"id":"RHSA-2018:0412","title":"Red Hat Security Advisory: kernel-rt security and bug fix update","status":"published","published":"2024-09-13T13:40:42Z","modified":"2026-07-01T10:03:26Z","cvss":[{"version":"3.0","score":7.6,"vector":"CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:04.822845Z"},{"id":"UBUNTU-CVE-2017-12188","description":"arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an \"MMU potential stack buffer overrun.\"","status":"published","published":"2017-10-11T00:00:00Z","modified":"2026-02-04T04:21:19.800739Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"},{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:13.729565Z"},{"id":"MGASA-2018-0062","title":"kernel update provides 4.14 series and fixes security vulnerabilities","description":"This kernel update provides an upgrade to the 4.14 longterm branch,\ncurrently based on 4.14.10. It also fixes at least the following\nsecurity issues:\n\nAn elevation of privilege vulnerability in the Broadcom wi-fi driver\n(CVE-2017-0786).\n\nUse-after-free vulnerability in the snd_pcm_info function in the ALSA\nsubsystem in the Linux kernel allows attackers to gain privileges via\nunspecified vectors (CVE-2017-0861).\n\nLinux kernel built with the Kernel-based Virtual Machine(CONFIG_KVM)\nsupport is vulnerable to an incorrect debug exception(#DB) error. It\ncould occur while emulating a syscall instruction. A user/process\ninside guest could use this flaw to potentially escalate their\nprivileges inside guest. Linux guests are not affected.(CVE-2017-7518).\n\narch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested\nvirtualisation is used, does not properly traverse guest pagetable\nentries to resolve a guest virtual address, which allows L1 guest OS\nusers to execute arbitrary code on the host OS or cause a denial of\nservice (incorrect index during page walking, and host OS crash), aka\nan \"MMU potential stack buffer overrun\" (CVE-2017-12188).\n\nThe bio_map_user_iov and bio_unmap_user functions in block/bio.c in the\nLinux kernel before 4.13.8 do unbalanced refcounting when a SCSI I/O\nvector has small consecutive buffers belonging to the same page. The\nbio_add_pc_page function merges them into one, but the page reference\nis never dropped. This causes a memory leak and possible system lockup\n(exploitable against the host OS by a guest OS user, if a SCSI disk is\npassed through to a virtual machine) due to an out-of-memory condition\n(CVE-2017-12190).\n\nThe assoc_array_insert_into_terminal_node function in lib/assoc_array.c\nin the Linux kernel before 4.13.11 mishandles node splitting, which allows\nlocal users to cause a denial of service (NULL pointer dereference and\npanic) via a crafted application, as demonstrated by the keyring key type,\nand key addition and link creation operations (CVE-2017-12193).\n\nWi-Fi Protected Access (WPA and WPA2) allows reinstallation of the Group\nTemporal Key (GTK) during the group key handshake, allowing an attacker\nwithin radio range to replay frames from access points to clients\n(CVE-2017-13080).\n\nThe sctp_do_peeloff function in net/sctp/socket.c in the Linux kernel\nbefore 4.14 does not check whether the intended netns is used in a\npeel-off action, which allows local users to cause a denial of\nservice (use-after-free and system crash) or possibly have unspecified\nother impact via crafted system calls (CVE-2017-15115).\n\nRace condition in the ALSA subsystem in the Linux kernel before 4.13.8\nallows local users to cause a denial of service (use-after-free) or\npossibly have unspecified other impact via crafted /dev/snd/seq ioctl\ncalls, related to sound/core/seq/seq_clientmgr.c and \nsound/core/seq/seq_ports.c (CVE-2017-15265)\n\nThe KEYS subsystem in the Linux kernel through 4.13.7 mishandles use of\nadd_key for a key that already exists but is uninstantiated, which allows\nlocal users to cause a denial of service (NULL pointer dereference and\nsystem crash) or possibly have unspecified other impact via a crafted\nsystem call (CVE-2017-15299).\n\nThe XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux\nkernel before 4.13.11 allows local users to gain privileges or cause a\ndenial of service (use-after-free) via a crafted SO_RCVBUF setsockopt\nsystem call in conjunction with XFRM_MSG_GETPOLICY Netlink messages\n(CVE-2017-16939).\n\nThe walk_hugetlb_range function in mm/pagewalk.c in the Linux kernel\nbefore 4.14.2 mishandles holes in hugetlb ranges, which allows local\nusers to obtain sensitive information from uninitialized kernel memory\nvia crafted use of the mincore() system call (CVE-2017-16994).\n\nThe check_alu_op function in kernel/bpf/verifier.c in the Linux kernel\nthrough 4.14.8 allows local users to cause a denial of service (memory\ncorruption) or possibly have unspecified other impact by leveraging\nincorrect sign extension (CVE-2017-16995).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging register truncation mishandling\n(CVE-2017-16996).\n\nThe KVM implementation in the Linux kernel through 4.14.7 allows attackers\nto obtain potentially sensitive information from kernel memory, aka a\nwrite_mmio stack-based out-of-bounds read, related to arch/x86/kvm/x86.c\nand include/trace/events/kvm.h (CVE-2017-17741).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging mishandling of 32-bit ALU ops\n(CVE-2017-17852).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging incorrect BPF_RSH signed bounds\ncalculations (CVE-2017-17853).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (integer overflow and memory\ncorruption) or possibly have unspecified other impact by leveraging\nunrestricted integer values for pointer arithmetic (CVE-2017-17854).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging improper use of pointers in\nplace of scalars (CVE-2017-17855).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly\nhave unspecified other impact by leveraging the lack of stack-pointer\nalignment enforcement (CVE-2017-17856).\n\nThe check_stack_boundary function in kernel/bpf/verifier.c in the Linux\nkernel through 4.14.8 allows local users to cause a denial of service\n(memory corruption) or possibly have unspecified other impact by\nleveraging mishandling of invalid variable stack read operations\n(CVE-2017-17857).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores\nunreachable code, even though it would still be processed by JIT\ncompilers. This behavior, also considered an improper branch-pruning\nlogic issue, could possibly be used by local users for denial of\nservice (CVE-2017-17862).\n\nkernel/bpf/verifier.c in the Linux kernel 4.9.x through 4.9.71 does not\ncheck the relationship between pointer values and the BPF stack, which\nallows local users to cause a denial of service (integer overflow or\ninvalid memory access) or possibly have unspecified other impact\n(CVE-2017-17863).\n\nkernel/bpf/verifier.c in the Linux kernel before 4.14 mishandles\nstates_equal comparisons between the pointer data type and the\nUNKNOWN_VALUE data type, which allows local users to obtain potentially\nsensitive address information, aka a \"pointer leak\" (CVE-2017-17864).\n\nThe timer_create syscall implementation in kernel/time/posix-timers.c\nin the Linux kernel before 4.14.8 doesn't properly validate the\nsigevent-\u003esigev_notify field, which leads to out-of-bounds access in\nthe show_timer function (called when /proc/$PID/timers is read).\nThis allows userspace applications to read arbitrary kernel memory\n(on a kernel built with CONFIG_POSIX_TIMERS and\nCONFIG_CHECKPOINT_RESTORE)(CVE-2017-18344).\n\nThe Linux Kernel 2.6.32 and later are affected by a denial of service,\nby flooding the diagnostic port 0x80 an exception can be triggered\nleading to a kernel panic (CVE-2017-1000407).\n\nThis update also adds support for WireGuard VPN.\n\nFor other changes in this update, read the referenced changelogs.\n","status":"published","published":"2018-01-06T00:53:31Z","modified":"2026-04-16T06:26:17.325590936Z","updated_at":"2026-11-02T15:49:40.442238Z"},{"id":"MGASA-2018-0063","title":"kernel-tmb update provides 4.14 series and fixes security vulnerabilities","description":"This kernel-tmb update provides an upgrade to the 4.14 longterm branch,\ncurrently based on 4.14.10. It also fixes at least the following\nsecurity issues:\n\nAn elevation of privilege vulnerability in the Broadcom wi-fi driver\n(CVE-2017-0786).\n\nUse-after-free vulnerability in the snd_pcm_info function in the ALSA\nsubsystem in the Linux kernel allows attackers to gain privileges via\nunspecified vectors (CVE-2017-0861).\n\nLinux kernel built with the Kernel-based Virtual Machine(CONFIG_KVM)\nsupport is vulnerable to an incorrect debug exception(#DB) error. It\ncould occur while emulating a syscall instruction. A user/process\ninside guest could use this flaw to potentially escalate their\nprivileges inside guest. Linux guests are not affected.(CVE-2017-7518).\n\narch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested\nvirtualisation is used, does not properly traverse guest pagetable\nentries to resolve a guest virtual address, which allows L1 guest OS\nusers to execute arbitrary code on the host OS or cause a denial of\nservice (incorrect index during page walking, and host OS crash), aka\nan \"MMU potential stack buffer overrun\" (CVE-2017-12188).\n\nThe bio_map_user_iov and bio_unmap_user functions in block/bio.c in the\nLinux kernel before 4.13.8 do unbalanced refcounting when a SCSI I/O\nvector has small consecutive buffers belonging to the same page. The\nbio_add_pc_page function merges them into one, but the page reference\nis never dropped. This causes a memory leak and possible system lockup\n(exploitable against the host OS by a guest OS user, if a SCSI disk is\npassed through to a virtual machine) due to an out-of-memory condition\n(CVE-2017-12190).\n\nThe assoc_array_insert_into_terminal_node function in lib/assoc_array.c\nin the Linux kernel before 4.13.11 mishandles node splitting, which allows\nlocal users to cause a denial of service (NULL pointer dereference and\npanic) via a crafted application, as demonstrated by the keyring key type,\nand key addition and link creation operations (CVE-2017-12193).\n\nWi-Fi Protected Access (WPA and WPA2) allows reinstallation of the Group\nTemporal Key (GTK) during the group key handshake, allowing an attacker\nwithin radio range to replay frames from access points to clients\n(CVE-2017-13080).\n\nThe sctp_do_peeloff function in net/sctp/socket.c in the Linux kernel\nbefore 4.14 does not check whether the intended netns is used in a\npeel-off action, which allows local users to cause a denial of\nservice (use-after-free and system crash) or possibly have unspecified\nother impact via crafted system calls (CVE-2017-15115).\n\nRace condition in the ALSA subsystem in the Linux kernel before 4.13.8\nallows local users to cause a denial of service (use-after-free) or\npossibly have unspecified other impact via crafted /dev/snd/seq ioctl\ncalls, related to sound/core/seq/seq_clientmgr.c and \nsound/core/seq/seq_ports.c (CVE-2017-15265)\n\nThe KEYS subsystem in the Linux kernel through 4.13.7 mishandles use of\nadd_key for a key that already exists but is uninstantiated, which allows\nlocal users to cause a denial of service (NULL pointer dereference and\nsystem crash) or possibly have unspecified other impact via a crafted\nsystem call (CVE-2017-15299).\n\nThe XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux\nkernel before 4.13.11 allows local users to gain privileges or cause a\ndenial of service (use-after-free) via a crafted SO_RCVBUF setsockopt\nsystem call in conjunction with XFRM_MSG_GETPOLICY Netlink messages\n(CVE-2017-16939).\n\nThe walk_hugetlb_range function in mm/pagewalk.c in the Linux kernel\nbefore 4.14.2 mishandles holes in hugetlb ranges, which allows local\nusers to obtain sensitive information from uninitialized kernel memory\nvia crafted use of the mincore() system call (CVE-2017-16994).\n\nThe check_alu_op function in kernel/bpf/verifier.c in the Linux kernel\nthrough 4.14.8 allows local users to cause a denial of service (memory\ncorruption) or possibly have unspecified other impact by leveraging\nincorrect sign extension (CVE-2017-16995).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging register truncation mishandling\n(CVE-2017-16996).\n\nThe KVM implementation in the Linux kernel through 4.14.7 allows attackers\nto obtain potentially sensitive information from kernel memory, aka a\nwrite_mmio stack-based out-of-bounds read, related to arch/x86/kvm/x86.c\nand include/trace/events/kvm.h (CVE-2017-17741).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging mishandling of 32-bit ALU ops\n(CVE-2017-17852).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging incorrect BPF_RSH signed bounds\ncalculations (CVE-2017-17853).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (integer overflow and memory\ncorruption) or possibly have unspecified other impact by leveraging\nunrestricted integer values for pointer arithmetic (CVE-2017-17854).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging improper use of pointers in\nplace of scalars (CVE-2017-17855).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly\nhave unspecified other impact by leveraging the lack of stack-pointer\nalignment enforcement (CVE-2017-17856).\n\nThe check_stack_boundary function in kernel/bpf/verifier.c in the Linux\nkernel through 4.14.8 allows local users to cause a denial of service\n(memory corruption) or possibly have unspecified other impact by\nleveraging mishandling of invalid variable stack read operations\n(CVE-2017-17857).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores\nunreachable code, even though it would still be processed by JIT\ncompilers. This behavior, also considered an improper branch-pruning\nlogic issue, could possibly be used by local users for denial of\nservice (CVE-2017-17862).\n\nkernel/bpf/verifier.c in the Linux kernel 4.9.x through 4.9.71 does not\ncheck the relationship between pointer values and the BPF stack, which\nallows local users to cause a denial of service (integer overflow or\ninvalid memory access) or possibly have unspecified other impact\n(CVE-2017-17863).\n\nkernel/bpf/verifier.c in the Linux kernel before 4.14 mishandles\nstates_equal comparisons between the pointer data type and the\nUNKNOWN_VALUE data type, which allows local users to obtain potentially\nsensitive address information, aka a \"pointer leak\" (CVE-2017-17864).\n\nThe timer_create syscall implementation in kernel/time/posix-timers.c\nin the Linux kernel before 4.14.8 doesn't properly validate the\nsigevent-\u003esigev_notify field, which leads to out-of-bounds access in\nthe show_timer function (called when /proc/$PID/timers is read).\nThis allows userspace applications to read arbitrary kernel memory\n(on a kernel built with CONFIG_POSIX_TIMERS and\nCONFIG_CHECKPOINT_RESTORE)(CVE-2017-18344).\n\nThe Linux Kernel 2.6.32 and later are affected by a denial of service,\nby flooding the diagnostic port 0x80 an exception can be triggered\nleading to a kernel panic (CVE-2017-1000407).\n\nThis update also adds support for WireGuard VPN.\n\nFor other changes in this update, read the referenced changelogs.\n","status":"published","published":"2018-01-06T00:53:31Z","modified":"2026-04-16T06:22:43.462881638Z","updated_at":"2026-11-02T15:49:40.442238Z"},{"id":"MGASA-2018-0064","title":"kernel-linus update provides 4.14 series and fixes security vulnerabilities","description":"This kernel-linus update provides an upgrade to the 4.14 longterm\nbranch, currently based on 4.14.10. It also fixes at least the\nfollowing security issues:\n\nAn elevation of privilege vulnerability in the Broadcom wi-fi driver\n(CVE-2017-0786).\n\nUse-after-free vulnerability in the snd_pcm_info function in the ALSA\nsubsystem in the Linux kernel allows attackers to gain privileges via\nunspecified vectors (CVE-2017-0861).\n\nLinux kernel built with the Kernel-based Virtual Machine(CONFIG_KVM)\nsupport is vulnerable to an incorrect debug exception(#DB) error. It\ncould occur while emulating a syscall instruction. A user/process\ninside guest could use this flaw to potentially escalate their\nprivileges inside guest. Linux guests are not affected.(CVE-2017-7518).\n\narch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested\nvirtualisation is used, does not properly traverse guest pagetable\nentries to resolve a guest virtual address, which allows L1 guest OS\nusers to execute arbitrary code on the host OS or cause a denial of\nservice (incorrect index during page walking, and host OS crash), aka\nan \"MMU potential stack buffer overrun\" (CVE-2017-12188).\n\nThe bio_map_user_iov and bio_unmap_user functions in block/bio.c in the\nLinux kernel before 4.13.8 do unbalanced refcounting when a SCSI I/O\nvector has small consecutive buffers belonging to the same page. The\nbio_add_pc_page function merges them into one, but the page reference\nis never dropped. This causes a memory leak and possible system lockup\n(exploitable against the host OS by a guest OS user, if a SCSI disk is\npassed through to a virtual machine) due to an out-of-memory condition\n(CVE-2017-12190).\n\nThe assoc_array_insert_into_terminal_node function in lib/assoc_array.c\nin the Linux kernel before 4.13.11 mishandles node splitting, which allows\nlocal users to cause a denial of service (NULL pointer dereference and\npanic) via a crafted application, as demonstrated by the keyring key type,\nand key addition and link creation operations (CVE-2017-12193).\n\nWi-Fi Protected Access (WPA and WPA2) allows reinstallation of the Group\nTemporal Key (GTK) during the group key handshake, allowing an attacker\nwithin radio range to replay frames from access points to clients\n(CVE-2017-13080).\n\nThe sctp_do_peeloff function in net/sctp/socket.c in the Linux kernel\nbefore 4.14 does not check whether the intended netns is used in a\npeel-off action, which allows local users to cause a denial of\nservice (use-after-free and system crash) or possibly have unspecified\nother impact via crafted system calls (CVE-2017-15115).\n\nRace condition in the ALSA subsystem in the Linux kernel before 4.13.8\nallows local users to cause a denial of service (use-after-free) or\npossibly have unspecified other impact via crafted /dev/snd/seq ioctl\ncalls, related to sound/core/seq/seq_clientmgr.c and \nsound/core/seq/seq_ports.c (CVE-2017-15265)\n\nThe KEYS subsystem in the Linux kernel through 4.13.7 mishandles use of\nadd_key for a key that already exists but is uninstantiated, which allows\nlocal users to cause a denial of service (NULL pointer dereference and\nsystem crash) or possibly have unspecified other impact via a crafted\nsystem call (CVE-2017-15299).\n\nThe XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux\nkernel before 4.13.11 allows local users to gain privileges or cause a\ndenial of service (use-after-free) via a crafted SO_RCVBUF setsockopt\nsystem call in conjunction with XFRM_MSG_GETPOLICY Netlink messages\n(CVE-2017-16939).\n\nThe walk_hugetlb_range function in mm/pagewalk.c in the Linux kernel\nbefore 4.14.2 mishandles holes in hugetlb ranges, which allows local\nusers to obtain sensitive information from uninitialized kernel memory\nvia crafted use of the mincore() system call (CVE-2017-16994).\n\nThe check_alu_op function in kernel/bpf/verifier.c in the Linux kernel\nthrough 4.14.8 allows local users to cause a denial of service (memory\ncorruption) or possibly have unspecified other impact by leveraging\nincorrect sign extension (CVE-2017-16995).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging register truncation mishandling\n(CVE-2017-16996).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging mishandling of 32-bit ALU ops\n(CVE-2017-17852).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging incorrect BPF_RSH signed bounds\ncalculations (CVE-2017-17853).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (integer overflow and memory\ncorruption) or possibly have unspecified other impact by leveraging\nunrestricted integer values for pointer arithmetic (CVE-2017-17854).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly have\nunspecified other impact by leveraging improper use of pointers in\nplace of scalars (CVE-2017-17855).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local\nusers to cause a denial of service (memory corruption) or possibly\nhave unspecified other impact by leveraging the lack of stack-pointer\nalignment enforcement (CVE-2017-17856).\n\nThe check_stack_boundary function in kernel/bpf/verifier.c in the Linux\nkernel through 4.14.8 allows local users to cause a denial of service\n(memory corruption) or possibly have unspecified other impact by\nleveraging mishandling of invalid variable stack read operations\n(CVE-2017-17857).\n\nkernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores\nunreachable code, even though it would still be processed by JIT\ncompilers. This behavior, also considered an improper branch-pruning\nlogic issue, could possibly be used by local users for denial of\nservice (CVE-2017-17862).\n\nkernel/bpf/verifier.c in the Linux kernel 4.9.x through 4.9.71 does not\ncheck the relationship between pointer values and the BPF stack, which\nallows local users to cause a denial of service (integer overflow or\ninvalid memory access) or possibly have unspecified other impact\n(CVE-2017-17863).\n\nkernel/bpf/verifier.c in the Linux kernel before 4.14 mishandles\nstates_equal comparisons between the pointer data type and the\nUNKNOWN_VALUE data type, which allows local users to obtain potentially\nsensitive address information, aka a \"pointer leak\" (CVE-2017-17864).\n\nThe timer_create syscall implementation in kernel/time/posix-timers.c\nin the Linux kernel before 4.14.8 doesn't properly validate the\nsigevent-\u003esigev_notify field, which leads to out-of-bounds access in\nthe show_timer function (called when /proc/$PID/timers is read).\nThis allows userspace applications to read arbitrary kernel memory\n(on a kernel built with CONFIG_POSIX_TIMERS and\nCONFIG_CHECKPOINT_RESTORE)(CVE-2017-18344).\n\nThe Linux Kernel 2.6.32 and later are affected by a denial of service,\nby flooding the diagnostic port 0x80 an exception can be triggered\nleading to a kernel panic (CVE-2017-1000407).\n\nFor other changes in this update, read the referenced changelogs.\n","status":"published","published":"2018-01-06T00:53:31Z","modified":"2026-04-16T06:22:49.505651352Z","updated_at":"2026-11-02T15:49:40.442238Z"},{"id":"USN-3484-2","title":"linux-hwe vulnerability","description":"USN-3484-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04.\nThis update provides the corresponding updates for the Linux Hardware\nEnablement (HWE) kernel from Ubuntu 17.04 for Ubuntu 16.04 LTS.\n\nIt was discovered that the KVM subsystem in the Linux kernel did not\nproperly keep track of nested levels in guest page tables. A local attacker\nin a guest VM could use this to cause a denial of service (host OS crash)\nor possibly execute arbitrary code in the host OS.\n","status":"published","published":"2017-11-21T06:23:50Z","modified":"2026-02-10T04:41:14Z","updated_at":"2026-11-02T16:58:13.496563Z"},{"id":"USN-3484-3","title":"linux-gcp vulnerability","description":"It was discovered that the KVM subsystem in the Linux kernel did not\nproperly keep track of nested levels in guest page tables. A local attacker\nin a guest VM could use this to cause a denial of service (host OS crash)\nor possibly execute arbitrary code in the host OS.\n","status":"published","published":"2017-11-21T18:23:08Z","modified":"2026-02-10T04:41:14Z","updated_at":"2026-11-02T16:58:13.496563Z"},{"id":"USN-3488-1","title":"linux-azure vulnerability","description":"It was discovered that the KVM subsystem in the Linux kernel did not\nproperly keep track of nested levels in guest page tables. A local attacker\nin a guest VM could use this to cause a denial of service (host OS crash)\nor possibly execute arbitrary code in the host OS.\n","status":"published","published":"2017-11-21T18:15:58Z","modified":"2026-02-10T04:41:15Z","updated_at":"2026-11-02T16:58:13.496563Z"}]}}