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.

The remote SUSE Linux SLES15 / SLES_SAP15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:4026-1 advisory.

    This update for fuse-overlayfs fixes the following issue:

      - CVE-2026-52791: Privilege Escalation Vulnerability via SUID/SGID Bit Preservation (bsc#1273100).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:21753-1 advisory.

    This update for fuse-overlayfs fixes the following issue:

    - CVE-2026-52791: privilege escalation due to SUID/SGID bit preservation after truncate operation     (bsc#1273100).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-4e0490640f advisory.

    Update to fuse-overlayfs 1.17 to fix CVE-2026-52791: privilege escalation via SUID/SGID bit preservation     on file truncation. When a file with SUID/SGID bits is truncated, those privilege bits should be cleared     but were not in versions prior to 1.17, allowing potential privilege escalation in rootless containers.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-52791)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
348475	SUSE SLES15 Security Update : fuse-overlayfs (SUSE-SU-2026:4026-1)	Nessus	SuSE Local Security Checks	Local	low
343958	openSUSE 16 Security Update : fuse-overlayfs (openSUSE-SU-2026:21753-1)	Nessus	SuSE Local Security Checks	Local	low
331524	Fedora 44 : fuse-overlayfs (2026-4e0490640f)	Nessus	Fedora Local Security Checks	Local	low
330725	Linux Distros Unpatched Vulnerability : CVE-2026-52791	Nessus	Misc.	Local	low

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CVE-2026-52791

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