CVE-2021-39802

NameCVE-2021-39802
DescriptionIn change_pte_range of mprotect.c , there is a possible way to make a shared mmap writable due to a permissions bypass. 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-213339151References: 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)stretch4.9.228-1undetermined
stretch (security)4.9.303-1undetermined
buster4.19.235-1undetermined
buster (security)4.19.232-1undetermined
bullseye5.10.106-1undetermined
bullseye (security)5.10.113-1undetermined
bookworm5.17.3-1undetermined
sid5.17.6-1undetermined

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)undetermined

Notes

https://source.android.com/security/bulletin/2022-04-01

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