CVE-2021-39686

NameCVE-2021-39686
DescriptionIn several functions of binder.c, there is a possible way to represent the wrong domain to SELinux due to a race condition. 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-200688826References: Upstream kernel
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)
ReferencesDLA-2940-1, DLA-2941-1, DSA-5096-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)buster, buster (security)4.19.249-2fixed
bullseye5.10.140-1vulnerable
bullseye (security)5.10.136-1vulnerable
bookworm5.19.6-1fixed
sid5.19.11-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcestretch4.9.303-1DLA-2940-1
linuxsourcebuster4.19.232-1DSA-5096-1
linuxsource(unstable)5.15.15-1
linux-4.19sourcestretch4.19.232-1~deb9u1DLA-2941-1

Notes

https://source.android.com/security/bulletin/2022-03-01

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