CVE-2021-3493β€”Linux Kernel Privilege Escalation Vulnerability

PUBLISHEDvulnerability record
2022-10-20 Β· last modified June 21, 2025

Metadata

CVE ID:
CVE-2021-3493
Project:
Linux
Product:
Kernel
Date Added:
2022-10-20
Due Date:
2022-11-10
Last Updated:
June 21, 2025

Vulnerability Name

Linux Kernel Privilege Escalation Vulnerability

Description

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.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:
Unknown

Action

Apply updates per vendor instructions.

Additional Notes

  • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7c03e2cda4a584cadc398e8f6641ca9988a39d52
  • https://nvd.nist.gov/vuln/detail/CVE-2021-3493

Related Weaknesses

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