CVE-2015-7550

NameCVE-2015-7550
DescriptionThe keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-378-1, DSA-3434-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie, jessie (lts)3.16.84-1fixed
stretch (security)4.9.320-2fixed
stretch (lts), stretch4.9.320-3fixed
buster4.19.249-2fixed
buster (security)4.19.304-1fixed
bullseye5.10.209-2fixed
bullseye (security)5.10.205-2fixed
bookworm6.1.76-1fixed
bookworm (security)6.1.69-1fixed
trixie6.6.15-2fixed
sid6.7.9-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcewheezy3.2.73-2+deb7u2DSA-3434-1
linuxsourcejessie3.16.7-ckt20-1+deb8u2DSA-3434-1
linuxsource(unstable)4.3.3-3
linux-2.6sourcesqueeze2.6.32-48squeeze18DLA-378-1
linux-2.6source(unstable)(unfixed)

Notes

https://git.kernel.org/linus/b4a1b4f5047e4f54e194681125c74c0aa64d637d (v4.4-rc8)

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