CVE-2021-42739

NameCVE-2021-42739
DescriptionA heap-based buffer overflow flaw was found in the Linux kernel FireDTV media card driver, where the user calls the CA_SEND_MSG ioctl. This flaw allows a local user of the host machine to crash the system or escalate privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2843-1, DLA-2941-1, DSA-5096-1, ELA-535-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie, jessie (lts)3.16.84-1vulnerable
stretch (security)4.9.320-2fixed
stretch (lts), stretch4.9.320-3fixed
buster4.19.249-2fixed
buster (security)4.19.289-2fixed
bullseye5.10.178-3fixed
bullseye (security)5.10.191-1fixed
bookworm6.1.38-1fixed
bookworm (security)6.1.52-1fixed
sid, trixie6.5.3-1fixed
linux-4.19 (PTS)stretch (security)4.19.232-1~deb9u1fixed
stretch (lts), stretch4.19.289-2~deb9u1fixed
linux-4.9 (PTS)jessie, jessie (lts)4.9.303-1~deb8u3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcejessie(unfixed)end-of-life
linuxsourcestretch4.9.290-1DLA-2843-1
linuxsourcebuster4.19.232-1DSA-5096-1
linuxsourcebullseye5.10.84-1
linuxsource(unstable)5.14.16-1
linux-4.19sourcestretch4.19.232-1~deb9u1DLA-2941-1
linux-4.9sourcejessie4.9.290-1~deb8u1ELA-535-1

Notes

https://seclists.org/oss-sec/2021/q2/46
https://lore.kernel.org/linux-media/YHaulytonFcW+lyZ@mwanda/

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