CVE-2016-6516

NameCVE-2016-6516
DescriptionRace condition in the ioctl_file_dedupe_range function in fs/ioctl.c in the Linux kernel through 4.7 allows local users to cause a denial of service (heap-based buffer overflow) or possibly gain privileges by changing a certain count value, aka a "double fetch" vulnerability.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)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
linuxsourcewheezy(not affected)
linuxsourcejessie(not affected)
linuxsource(unstable)4.7.2-1

Notes

[jessie] - linux <not-affected> (Vulnerable code introduced later)
[wheezy] - linux <not-affected> (Vulnerable code introduced later)
Introduced by: https://git.kernel.org/linus/54dbc15172375641ef03399e8f911d7165eb90fb (v4.5-rc1)
Fixed by: https://git.kernel.org/linus/10eec60ce79187686e052092e5383c99b4420a20

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