SUSE-SU-2018:1375-1

SUSE-SU-2018:1375-1 · Security update for the Linux Kernel

This page contains facts from public vulnerability sources. Check the original advisory before updating.

The SUSE Linux Enterprise 12 SP1 LTSS kernel was updated to receive various security and bugfixes. The following security bugs were fixed: - CVE-2018-3639: Information leaks using 'Memory Disambiguation' feature in modern CPUs were mitigated, aka 'Spectre Variant 4' (bnc#1087082). A new boot commandline option was introduced, 'spec_store_bypass_disable', which can have following values: - auto: Kernel detects whether your CPU model contains an implementation of Speculative Store Bypass and picks the most appropriate mitigation. - on: disable Speculative Store Bypass - off: enable Speculative Store Bypass - prctl: Control Speculative Store Bypass per thread via prctl. Speculative Store Bypass is enabled for a process by default. The state of the control is inherited on fork. - seccomp: Same as 'prctl' above, but all seccomp threads will disable SSB unless they explicitly opt out. The default is 'seccomp', meaning programs need explicit opt-in into the mitigation. Status can be queried via the /sys/devices/system/cpu/vulnerabilities/spec_store_bypass file, containing: - 'Vulnerable' - 'Mitigation: Speculative Store Bypass disabled' - 'Mitigation: Speculative Store Bypass disabled via prctl' - 'Mitigation: Speculative Store Bypass disabled via prctl and seccomp' - CVE-2018-1000199: An address corruption flaw was discovered while modifying a h/w breakpoint via 'modify_user_hw_breakpoint' routine, an unprivileged user/process could use this flaw to crash the system kernel resulting in DoS OR to potentially escalate privileges on a the system. (bsc#1089895) - CVE-2018-10675: The do_get_mempolicy function in mm/mempolicy.c allowed local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted system calls (bnc#1091755). The following non-security bugs were fixed: - x86/bugs: Make sure that _TIF_SSBD does not end up in _TIF_ALLWORK_MASK (bsc#1093215). - x86/bugs: correctly force-disable IBRS on !SKL systems (bsc#1092497). - x86/cpu/intel: Introduce macros for Intel family numbers (bsc#985025). - x86/speculation: Remove Skylake C2 from Speculation Control microcode blacklist (bsc#1087845).

Fix available

Published

2018-05-22T11:30:24Z

Updated

2026-02-04T04:14:04.617229Z

Stack: system

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