CVE-2023-2640
On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user...
- Published
- Jul 26, 2023
- Updated
- Oct 23, 2024
- Assigning CNA
- canonical
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HModerate · next 30 days
- Percentile
- 96.7%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
15A clean, interactive multi-step Local Privilege Escalation (LPE) exploit for Ubuntu OverlayFS (GameOver(lay)) that escapes the user namespace sandbox to drop a true host root shell.
- CVE-2023-2640-CVE-2023-32629Exploit
GameOver(lay) Ubuntu Privilege Escalation
- GameOverlayFSExploit
Shell script exploit for CVE-2023-2640 and CVE-2023-32629 targeting OverlayFS vulnerability on Ubuntu 20.04 to achieve local privilege escalation to root.
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