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runc: opencontainers/selinux: container escape and denial of service due to arbitrary write gadgets and procfs write redirects

🗓️ 05 Feb 2026 16:39:36Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 3 Views

A runc SELinux flaw enabling container escape and denial of service via arbitrary writes and procfs redirects.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8aarch64runc4:1.2.9-1.rhaos4.16.el8runc-4:1.2.9-1.rhaos4.16.el8.aarch64.rpm
Red Hat Enterprise Linux8ppc64lerunc4:1.2.9-1.rhaos4.16.el8runc-4:1.2.9-1.rhaos4.16.el8.ppc64le.rpm
Red Hat Enterprise Linux8s390xrunc4:1.2.9-1.rhaos4.16.el8runc-4:1.2.9-1.rhaos4.16.el8.s390x.rpm
Red Hat Enterprise Linux8x86_64runc4:1.2.9-1.rhaos4.16.el8runc-4:1.2.9-1.rhaos4.16.el8.x86_64.rpm
Red Hat Enterprise Linux9aarch64runc4:1.2.9-1.rhaos4.16.el9runc-4:1.2.9-1.rhaos4.16.el9.aarch64.rpm
Red Hat Enterprise Linux9ppc64lerunc4:1.2.9-1.rhaos4.16.el9runc-4:1.2.9-1.rhaos4.16.el9.ppc64le.rpm
Red Hat Enterprise Linux9s390xrunc4:1.2.9-1.rhaos4.16.el9runc-4:1.2.9-1.rhaos4.16.el9.s390x.rpm
Red Hat Enterprise Linux9x86_64runc4:1.2.9-1.rhaos4.16.el9runc-4:1.2.9-1.rhaos4.16.el9.x86_64.rpm
Red Hat Enterprise Linux8aarch64runc-debuginfo4:1.2.9-1.rhaos4.16.el8runc-debuginfo-4:1.2.9-1.rhaos4.16.el8.aarch64.rpm
Red Hat Enterprise Linux8ppc64lerunc-debuginfo4:1.2.9-1.rhaos4.16.el8runc-debuginfo-4:1.2.9-1.rhaos4.16.el8.ppc64le.rpm
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18 Jul 2026 23:37Current
7.3High risk
Vulners AI Score7.3
CVSS 3.17.5
CVSS 47.3
EPSS0.00523
SSVC
CWE-59
runcselinuxcontainer escapedenial of servicearbitrary writesprocfs redirectslsm labelslabel verificationlimited mitigation
3