PT-2026-65846 · Containers · Fuse-Overlayfs

CVE-2026-52791 · Published 2026-07-29 · Updated 2026-07-29

NVD

CVSS v4.0

2.0

Low

Base vector

AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

fuse-overlayfs is an implementation of overlayfs in FUSE for rootless containers. Prior to 1.17, the release-1.x C branch preserves SUID and SGID mode bits in main.c during open(O TRUNC) and truncate handling on a copied-up file, allowing a low-privileged process to leave the upper-layer file with mode 4777. This issue is fixed in version 1.17.

Exploit

Fix

Incorrect Privilege Assignment

Weakness Enumeration

CWE-266

Related Identifiers

CVE-2026-52791

Affected Products

Fuse-Overlayfs

References · 4

• 🔥 https://github.com/containers/fuse-overlayfs/security/advisories/GHSA-2cc4-p72c-v85h · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-52791 · Security Note
• https://github.com/containers/fuse-overlayfs/releases/tag/v1.17 · Note
• https://github.com/containers/fuse-overlayfs/commit/97e0d968a782fc259ebde112db1e9b9ff1ad724f · Note