CVE-2021-33656

NameCVE-2021-33656
DescriptionWhen setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)buster4.19.235-1vulnerable
buster (security)4.19.249-2vulnerable
bullseye5.10.127-1fixed
bullseye (security)5.10.127-2fixed
bookworm, sid5.18.14-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcebullseye5.10.127-1
linuxsource(unstable)5.14.6-1

Notes

https://git.kernel.org/linus/ff2047fb755d4415ec3c70ac799889371151796d (v5.12-rc1)

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