CVE-2017-18224

NameCVE-2017-18224
DescriptionIn the Linux kernel before 4.15, fs/ocfs2/aops.c omits use of a semaphore and consequently has a race condition for access to the extent tree during read operations in DIRECT mode, which allows local users to cause a denial of service (BUG) by modifying a certain e_cpos field.
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)
ReferencesDSA-4188-1
NVD severitylow (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie3.16.56-1+deb8u1fixed
jessie (security)3.16.59-1fixed
stretch4.9.110-1fixed
stretch (security)4.9.110-3+deb9u6fixed
buster, sid4.18.10-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.15.4-1low
linuxsourcejessie(not affected)
linuxsourcestretch4.9.88-1lowDSA-4188-1
linuxsourcewheezy(not affected)

Notes

[jessie] - linux <not-affected> (Vulnerable code introduced later)
[wheezy] - linux <not-affected> (Vulnerable code introduced later)
https://git.kernel.org/linus/3e4c56d41eef5595035872a2ec5a483f42e8917f

Search for package or bug name: Reporting problems