CVE-2020-29660

NameCVE-2020-29660
DescriptionA locking inconsistency issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may allow a read-after-free attack against TIOCGSID, aka CID-c8bcd9c5be24.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2557-1, DLA-2586-1, DSA-4843-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)bullseye5.10.223-1fixed
bullseye (security)5.10.226-1fixed
bookworm6.1.115-1fixed
bookworm (security)6.1.119-1fixed
trixie6.11.10-1fixed
sid6.12.3-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcestretch4.9.258-1DLA-2586-1
linuxsourcebuster4.19.171-2DSA-4843-1
linuxsource(unstable)5.9.15-1
linux-4.19sourcestretch4.19.171-2~deb9u1DLA-2557-1

Notes

https://git.kernel.org/linus/c8bcd9c5be24fb9e6132e97da5a35e55a83e36b9
https://bugs.chromium.org/p/project-zero/issues/detail?id=2125
https://googleprojectzero.blogspot.com/2021/10/how-simple-linux-kernel-memory.html

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