CVE-2026-52791
fuse-overlayfs release-1.x preserves SUID/SGID bits after truncate/open(O_TRUNC)
- State
- Published
- Severity
- 2.0 Low
- Published
- Jul 29, 2026
- Updated
- Jul 29, 2026
- Reserved
- Jun 8, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.0 Low | CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | GitHub_M |
Weaknesses
- CWE-266 Incorrect Privilege Assignment
Affected Products
| Product | Versions |
|---|---|
fuse-overlayfscontainers |
|
References
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