CVE-2021-22600
Linux Kernel Privilege Escalation Vulnerability
IN CISA KEV
Linux Kernel contains a flaw in the packet socket (AF_PACKET) implementation which could lead to incorrectly freeing memory. A local user could exploit this for denial-of-service (DoS) or possibly for privilege escalation.
- Vendor
- Linux
- Product
- Kernel
- CVSS
- No score recorded (no NVD record loaded for this entry)
- CWE
- CWE-415
- Published
- Not recorded
- NVD modified
- Not recorded
CISA KEV
- Date added
- 2022-04-11
- Due date
- 2022-05-02
- Ransomware use
- Unknown
- Required action
- Apply updates per vendor instructions.
EPSS
6.59% chance of exploitation in the next 30 days (percentile 93rd)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.