CVE-2026-19079

Description

A TOCTOU (Time-of-Check-Time-of-Use) race condition vulnerability was found in the fixfiles script in policycoreutils. When running fixfiles relabel or fixfiles restore, the script used find and chcon commands to locate and relabel unlabeled files under /tmp and other directories. A local attacker could exploit a race window between the file discovery and the label change operation by swapping directory components with symlinks, causing chcon to follow the symlink and modify SELinux labels on arbitrary system files. This could undermine SELinux mandatory access control protections on critical files such as /etc/shadow.

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Produits concernés

• Red Hat Hardened Images
• Red Hat Enterprise Linux 10
• Red Hat Enterprise Linux 6
• Red Hat Enterprise Linux 7
• Red Hat Enterprise Linux 8
• Red Hat Enterprise Linux 9
• Red Hat OpenShift Container Platform 4

Scores CVSS

Faiblesses (CWE)

• CWE-367

Références

• https://access.redhat.com/errata/RHSA-2026:51861
• https://access.redhat.com/security/cve/CVE-2026-19079
• https://bugzilla.redhat.com/show_bug.cgi?id=2511976
• https://github.com/SELinuxProject/selinux/commit/a556538c2d5d2583273e025b45c02651fef47679

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories