CVE-2026-52791

unknowncovered by 1 sourcefirst seen 2026-07-29

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.

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Exploitation outlook

Low exploitation risk0.10% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all EPSS-scored CVEs.

Advisory coverage (1)

unknownCVE-2026-52791: fuse-overlayfs is an implementation of overlayfs in FUSE for rootless containers. Prior to 1.1…nvd · 2026-07-29

External references

NVD record for CVE-2026-52791

CVE.org record

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