CVE-2026-59676 SELinuxProject CVE debrief

Who should care

System administrators and security teams responsible for SELinux policycoreutils installations, particularly in environments using unconfined SELinux domains, should assess exposure and prioritize verification and potential remediation.

Why it matters

CVE-2026-59676 is a TOCTOU Race Condition vulnerability in seunshare of selinux policycoreutils that could allow users in unconfined SELinux domains to delete arbitrary root-owned files. Defenders should verify the presence of this vulnerability, assess exposure, and prioritize remediation in systems at risk.

• Potential for unauthorized deletion of root-owned files
• Increased risk in systems with unconfined SELinux domains
• Verification of system integrity and file permissions required

Technical summary

A Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability exists in seunshare of selinux policycoreutils. This allows a user running seunshare in an unconfined SELinux domain to delete arbitrary files owned by root. The issue affects policycoreutils through version 3.10. The vulnerability has a CVSS score of 5.8 and is considered MEDIUM severity. Defenders should prioritize verifying the presence of this vulnerability in their SELinux policycoreutils installations and assess exposure, particularly in systems where unconfined SELinux domains are used.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their SELinux policycoreutils installations and assess exposure, particularly in systems where unconfined SELinux domains are used.

Recommended defensive actions

• Verify the version of policycoreutils is not earlier than 3.10.
• Assess exposure in systems using unconfined SELinux domains.
• Monitor for potential exploitation attempts.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected systems and exploitation attempts is limited. Defenders should verify the presence of this vulnerability in their SELinux policycoreutils installations and assess exposure, particularly in systems where unconfined SELinux domains are used. The official CVE Program record and NVD detail page offer source-provided CVE metadata and vulnerability assessment. However, further verification is required to ensure system integrity and file

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.