CVE-2018-1091

NameCVE-2018-1091
DescriptionIn the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie3.16.51-2fixed
jessie (security)3.16.56-1+deb8u1fixed
stretch4.9.82-1+deb9u3fixed
stretch (security)4.9.88-1+deb9u1fixed
buster4.16.12-1fixed
sid4.16.16-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.13.10-1medium
linuxsourcejessie(not affected)
linuxsourcestretch4.9.65-1medium
linuxsourcewheezy(not affected)

Notes

[jessie] - linux <not-affected> (Hardware not supported; POWER9 support missing)
[wheezy] - linux <not-affected> (Hardware not supported)
Fixed by: https://git.kernel.org/linus/c1fa0768a8713b135848f78fd43ffc208d8ded70

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