CVE-2021-39634

NameCVE-2021-39634
DescriptionIn fs/eventpoll.c, there is a possible use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-204450605References: Upstream kernel
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)stretch4.9.228-1vulnerable
stretch (security)4.9.290-1fixed
buster4.19.208-1fixed
buster (security)4.19.194-3fixed
bullseye5.10.84-1fixed
bullseye (security)5.10.46-5fixed
bookworm, sid5.15.5-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcestretch4.9.240-1
linuxsourcebuster4.19.152-1
linuxsource(unstable)5.8.14-1

Notes

https://source.android.com/security/bulletin/2022-01-01
https://git.kernel.org/linus/f8d4f44df056c5b504b0d49683fb7279218fd207 (5.9-rc8)

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