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CVE Record
[ HIGH ]CVE-2021-3493

Linux Kernel Privilege Escalation Vulnerability

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.

cat cve-2021-3493.json
Vendor
Linux
Product
Kernel
CVSS
8.8
EPSS (exploit probability)
49.2%
Status
kev
CISA patch-by (BOD 22-01)
Published
Source
https://nvd.nist.gov/vuln/detail/CVE-2021-3493

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.

Added to CISA’s Known Exploited Vulnerabilities catalog on 2022-10-20. Required action per CISA: Apply updates per vendor instructions. Due date: 2022-11-10.

This is an auto-synced KEV catalog record pending a full 0dayNews write-up — see CISA’s KEV catalog and the NVD record linked above for primary sources.