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HistoryMay 11, 2018 - 9:10 p.m.

Security update for the Linux Kernel (important)


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The SUSE Linux Enterprise 12 GA LTSS kernel was updated to receive various
security and bugfixes.

The following security bugs were fixed:

  • CVE-2018-1087: And an unprivileged KVM guest user could use this flaw to
    potentially escalate their privileges inside a guest. (bsc#1087088)
  • CVE-2018-8897: An unprivileged system user could use incorrect set up
    interrupt stacks to crash the Linux kernel resulting in DoS issue.
  • CVE-2018-8781: The udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c
    had an integer-overflow vulnerability allowing local users with access
    to the udldrmfb driver to obtain full read and write permissions on
    kernel physical pages, resulting in a code execution in kernel space
  • CVE-2018-10124: The kill_something_info function in kernel/signal.c
    might allow local users to cause a denial of service via an INT_MIN
    argument (bnc#1089752).
  • CVE-2018-10087: The kernel_wait4 function in kernel/exit.c might allow
    local users to cause a denial of service by triggering an attempted use
    of the -INT_MIN value (bnc#1089608).
  • CVE-2018-7757: Memory leak in the sas_smp_get_phy_events function in
    drivers/scsi/libsas/sas_expander.c allowed local users to cause a denial
    of service (memory consumption) via many read accesses to files in the
    /sys/class/sas_phy directory, as demonstrated by the
    /sys/class/sas_phy/phy-1:0:12/invalid_dword_count file (bnc#1084536
  • CVE-2017-13220: An elevation of privilege vulnerability in the Upstream
    kernel bluez was fixed. (bnc#1076537).
  • CVE-2017-11089: A buffer overread was observed in nl80211_set_station
    when user space application sends attribute
    NL80211_ATTR_LOCAL_MESH_POWER_MODE with data of size less than 4 bytes
  • CVE-2017-0861: Use-after-free vulnerability in the snd_pcm_info function
    in the ALSA subsystem allowed attackers to gain privileges via
    unspecified vectors (bnc#1088260).
  • CVE-2018-8822: Incorrect buffer length handling in the ncp_read_kernel
    function in fs/ncpfs/ncplib_kernel.c could be exploited by malicious
    NCPFS servers to crash the kernel or execute code (bnc#1086162).
  • CVE-2017-18203: The dm_get_from_kobject function in drivers/md/dm.c
    allow local users to cause a denial of service (BUG) by leveraging a
    race condition with __dm_destroy during creation and removal of DM
    devices (bnc#1083242).

The following non-security bugs were fixed:

  • Integrate fixes resulting from bsc#1088147 More info in the respective
    commit messages.
  • KABI: x86/kaiser: properly align trampoline stack (bsc#1087260).
  • kGraft: fix small race in reversion code (bsc#1083125).
  • kabi/severities: Ignore kgr_shadow_* kABI changes
  • kvm/x86: fix icebp instruction handling (bsc#1087088).
  • livepatch: Allow to call a custom callback when freeing shadow variables
    (bsc#1082299 fate#313296).
  • livepatch: Initialize shadow variables safely by a custom callback
    (bsc#1082299 fate#313296).
  • x86/entry/64: Do not use IST entry for #BP stack (bsc#1087088).
  • x86/kaiser: properly align trampoline stack (bsc#1087260).
  • x86/retpoline: do not perform thunk calls in ring3 vsyscall code