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

🗓️ 12 Jan 2026 03:43:04Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 3 Views

runc selinux flaw allows container escape and DoS via arbitrary writes to procfs; could miswrite LSM labels to a dummy tmpfs.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.4aarch64runc4:1.2.9-1.el9_4runc-4:1.2.9-1.el9_4.aarch64.rpm
Red Hat Enterprise Linux9.4ppc64lerunc4:1.2.9-1.el9_4runc-4:1.2.9-1.el9_4.ppc64le.rpm
Red Hat Enterprise Linux9.4s390xrunc4:1.2.9-1.el9_4runc-4:1.2.9-1.el9_4.s390x.rpm
Red Hat Enterprise Linux9.4x86_64runc4:1.2.9-1.el9_4runc-4:1.2.9-1.el9_4.x86_64.rpm
Red Hat Enterprise Linux9.4aarch64runc-debuginfo4:1.2.9-1.el9_4runc-debuginfo-4:1.2.9-1.el9_4.aarch64.rpm
Red Hat Enterprise Linux9.4ppc64lerunc-debuginfo4:1.2.9-1.el9_4runc-debuginfo-4:1.2.9-1.el9_4.ppc64le.rpm
Red Hat Enterprise Linux9.4s390xrunc-debuginfo4:1.2.9-1.el9_4runc-debuginfo-4:1.2.9-1.el9_4.s390x.rpm
Red Hat Enterprise Linux9.4x86_64runc-debuginfo4:1.2.9-1.el9_4runc-debuginfo-4:1.2.9-1.el9_4.x86_64.rpm
Red Hat Enterprise Linux9.4aarch64runc-debugsource4:1.2.9-1.el9_4runc-debugsource-4:1.2.9-1.el9_4.aarch64.rpm
Red Hat Enterprise Linux9.4ppc64lerunc-debugsource4:1.2.9-1.el9_4runc-debugsource-4:1.2.9-1.el9_4.ppc64le.rpm
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18 Jul 2026 03:46Current
7.1High risk
Vulners AI Score7.1
CVSS 3.17.5
CVSS 47.3
EPSS0.00523
SSVC
CWE-59
runc vulnerabilityopencontainers selinuxcontainer escapedenial of serviceprocfs redirectslsm labels
3