CriticalCVECISA — Known Exploited Vulnerabilities· 20 Oct 2022
CVE-2021-3493 — Linux Kernel Privilege Escalation Vulnerability
Severity: Critical · Kind: Vulnerability
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From the source
Linux Kernel. The overlayfs stacking file system in Linux kernel does not properly validate the application of file capabilities against user namespaces, which could lead to privilege escalation. Required action: Apply updates per vendor instructions.
Vulnerability facts
- CVE
- CVE-2021-3493
- On CISA KEV since
- 2022-10-20
- Ransomware use
- Unknown
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Plain-English summaries are AI-generated and reviewed for tone, not technical accuracy. For incident response, always rely on the original source linked above.