RHSA-2026:25253HighCVSS 7.5

Red Hat Security Advisory: runc security update

Published
June 11, 2026
Last Modified
September 4, 2026

🔗 CVE IDs covered (6)

CVE-2026-23381 →CVE-2026-25679 →CVE-2026-32280 →CVE-2025-61726 →CVE-2025-61729 →CVE-2025-68121 →

📋 Description

CVE-2025-61726 — golang: net/url: Memory exhaustion in query parameter parsing in net/url CVE-2025-61729 — crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate CVE-2025-68121 — crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption CVE-2026-23381 — kernel: net: bridge: fix nd_tbl NULL dereference when IPv6 is disabled CVE-2026-25679 — net/url: Incorrect parsing of IPv6 host literals in net/url CVE-2026-32280 — crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building

🎯 Affected products14

  • Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-4:1.2.9-1.el9_2.2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-4:1.2.9-1.el9_2.2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-4:1.2.9-1.el9_2.2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-4:1.2.9-1.el9_2.2.src as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-4:1.2.9-1.el9_2.2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-debuginfo-4:1.2.9-1.el9_2.2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-debuginfo-4:1.2.9-1.el9_2.2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-debuginfo-4:1.2.9-1.el9_2.2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-debuginfo-4:1.2.9-1.el9_2.2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-debugsource-4:1.2.9-1.el9_2.2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-debugsource-4:1.2.9-1.el9_2.2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-debugsource-4:1.2.9-1.el9_2.2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • runc-debugsource-4:1.2.9-1.el9_2.2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible. Workaround: Do not use the ipv6.disable=1 boot parameter on systems using network bridging with neighbor suppression, or disable neigh_suppress on bridges when IPv6 is disabled. Workaround: 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.

🔗 References (7)