Bug 2509243 - CVE-2026-52791 apptainer: fuse-overlayfs: Privilege Escalation Vulnerability via SUID/SGID Bit Preservation [epel-all]
Summary: CVE-2026-52791 apptainer: fuse-overlayfs: Privilege Escalation Vulnerability ...
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: apptainer
Version: epel10
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Dave Dykstra
QA Contact:
URL:
Whiteboard: {"flaws": ["bfea971a-419d-4df7-bce3-e...
Depends On:
Blocks: CVE-2026-52791
TreeView+ depends on / blocked
 
Reported: 2026-07-30 10:46 UTC by jkelly
Modified: 2026-07-30 22:32 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2026-07-30 22:32:39 UTC
Type: ---
Embargoed:


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Description jkelly 2026-07-30 10:46:05 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A flaw was found in fuse-overlayfs, a component used for rootless containers. This vulnerability allows a low-privileged process to retain SUID (Set User ID) and SGID (Set Group ID) permissions on files after they are truncated or opened with the O_TRUNC flag. This can enable a local attacker to manipulate file permissions, potentially leading to privilege escalation within the system.

Comment 1 Dave Dykstra 2026-07-30 22:32:39 UTC
Apptainer always sets the NO_NEW_PRIVS flag so this vulnerability is not applicable.


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