ACTIVELY EXPLOITED
CVE-2021-22600: Linux Kernel Privilege Escalation Vulnerability
| Vendor | Linux |
|---|---|
| Product | Kernel |
| Actively exploited | Yes |
| Added to CISA KEV | 11 Apr 2022 |
| CISA federal deadline | 2 May 2022 |
| Weakness (CWE) | CWE-415 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
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.
SOURCES
Other Linux flaws
- CVE-2026-46300: Linux Kernel Missing Initialization of a Variable Vulnerability
- CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability
- CVE-2025-39964: Linux Kernel Race Condition Vulnerability
- CVE-2025-39682: Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
- CVE-2026-53362: Linux Kernel Unspecified Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.