CVE-2018-20836

NameCVE-2018-20836
DescriptionAn issue was discovered in the Linux kernel before 4.20. There is a race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, leading to a use-after-free.
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)
ReferencesDLA-1884-1, DLA-1885-1, DSA-4495-1, DSA-4497-1
NVD severityhigh

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie3.16.56-1+deb8u1vulnerable
jessie (security)3.16.76-1fixed
stretch4.9.189-3fixed
stretch (security)4.9.189-3+deb9u2fixed
buster4.19.67-2+deb10u1fixed
buster (security)4.19.67-2+deb10u2fixed
bullseye5.3.9-3fixed
sid5.3.15-1fixed
linux-4.9 (PTS)jessie (security)4.9.189-3+deb9u2~deb8u1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)5.2.6-1
linuxsourcebuster4.19.37-5+deb10u2DSA-4495-1
linuxsourcejessie3.16.72-1DLA-1884-1
linuxsourcestretch4.9.168-1+deb9u5DSA-4497-1
linux-4.9sourcejessie4.9.168-1+deb9u5~deb8u1DLA-1885-1

Notes

Fixed by: https://git.kernel.org/linus/b90cd6f2b905905fb42671009dc0e27c310a16ae

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