Android Kernel Race Condition Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-05-23

[ Description ]Official description

In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel

CISA: Android kernel contains a race condition, which allows for a use-after-free vulnerability. Exploitation can allow for privilege escalation.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 13 Jun 2022): Apply updates per vendor instructions.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlMailing ListThird Party Advisory
• source.android.com/security/bulletin/2021-11-01Vendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogThird Party AdvisoryUS Government Resource