Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/containers/fuse-overlayfs/commit/97e0d968a782fc259ebde112db1e
- https://github.com/containers/fuse-overlayfs/releases/tag/v1.17
- https://github.com/containers/fuse-overlayfs/security/advisories/GHSA-2cc4-p72c-
- https://github.com/containers/fuse-overlayfs/security/advisories/GHSA-2cc4-p72c-
FAQ
What is CVE-2026-52791?
CVE-2026-52791 is a documented vulnerability. 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 ...
How severe is CVE-2026-52791?
CVSS scoring is not yet available for CVE-2026-52791. Check NVD for updates.
Is there a patch for CVE-2026-52791?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.