CVE-2026-52791
LOWfuse-overlayfs release-1.x preserves SUID/SGID bits after truncate/open(O_TRUNC)
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/containers/fuse-overlayfs/security/advisories/GHSA-2cc4-p72c-v85h
X_Refsource_Misc x_refsource_misc
https://github.com/containers/fuse-overlayfs/commit/97e0d968a782fc259ebde112db1e9b9ff1ad724f
X_Refsource_Misc x_refsource_misc
https://github.com/containers/fuse-overlayfs/releases/tag/v1.17
Scores
CVSS v4
2.0
EPSS
0.0010
EPSS Percentile
1.1%
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/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
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-266
Status
published
Products (1)
containers/fuse-overlayfs
< 1.17
Published
Jul 29, 2026
Tracked Since
Jul 29, 2026