Medium [CVE-2026-59677] Denial of Service via missing authorization in seunshares
This medium-severity Red Hat Linux advisory covers CVE-2026-59677 affecting Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6.
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Summary
A Missing Authorization vulnerability in selinux policycoreutils seunshares allows a user that is running in unconfined context to kill e.g. root-owned processes running also in unconfined context This issue affects policycoreutils through 3.10. That can cause denial of service by killing critical processes.
A local low-privileged user running unconfined may kill other unconfined processes, including root-owned ones, causing denial of service. Default confined SELinux setups reduce the practical attack surface.
Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-266.
Affected Red Hat products: 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. Red Hat fixing advisory: RHSA-2026:44343.
Affected products named by the advisory: Red Hat package: policycoreutils.
- policycoreutils-main-3.11-2.1.hum1
- RHSA-2026:44343
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
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