Bug 2460778 (CVE-2026-35376) - CVE-2026-35376 rust-coreutils: chcon: security bypass and mandatory access control (MAC) inconsistency via TOCTOU race condition
Summary: CVE-2026-35376 rust-coreutils: chcon: security bypass and mandatory access co...
Keywords:
Status: NEW
Alias: CVE-2026-35376
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2461665 2461666
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-22 17:02 UTC by OSIDB Bzimport
Modified: 2026-07-18 08:29 UTC (History)
9 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-04-22 17:02:10 UTC
A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the chcon utility of uutils coreutils during recursive operations. The implementation resolves recursive targets using a fresh path lookup (via fts_accpath) rather than binding the traversal and label application to the specific directory state encountered during traversal. Because these operations are not anchored to file descriptors, a local attacker with write access to a directory tree can exploit timing-sensitive rename or symbolic link races to redirect a privileged recursive relabeling operation to unintended files or directories. This vulnerability breaks the hardening expectations for SELinux administration workflows and can lead to the unauthorized modification of security labels on sensitive system objects.


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