Linux Kernel Privilege Escalation Vulnerability (CVE-2021-22600)
Severity: high · Patch status: patched · Since 2022-04-11 · CVE-2021-22600
Linux Kernel contains a flaw in the packet socket (AFPACKET) implementation which could lead to incorrectly freeing memory. A local user could exploit this for denial-of-service (DoS) or possibly for privilege escalation. CISA added CVE-2021-22600 to its Known Exploited Vulnerabilities catalog on Apr 11, 2022, which means attackers are exploiting it in the wild.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by May 2, 2022 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
