VULNERABILITY INTELLIGENCE

CVE-2023-2640

CVSS score7.8 HIGH

EPSS probability15.20%

CISA KEVNot currently listed

Published2023-07-26

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.

Weakness classification

security@ubuntu.com: CWE-863
nvd@nist.gov: CWE-863

Primary references

security@ubuntu.com — Third Party Advisory
security@ubuntu.com — Mailing List, Patch
security@ubuntu.com — Vendor Advisory
security@ubuntu.com — Exploit, Mitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Mitigation, Third Party Advisory