This Red Hat security update addresses four vulnerabilities in the runc container runtime stemming from its underlying Go components, including a critical TLS session resumption flaw (CVE-2025-68121, CVSS 10.0) and high-severity issues causing resource exhaustion and parsing errors. The affected versions are runc packages built with Go versions earlier than 1.24.13 or 1.25.7, as detailed in the NVD data for the critical CVE. The fix is to apply the Red Hat-provided runc update for the specified Enterprise Linux channels.
Red Hat Product Errata RHSA-2026:25253 - Security Advisory Issued: 2026-06-11 Updated: 2026-06-11 RHSA-2026:25253 - Security Advisory Overview Updated Packages Synopsis Important: runc security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for runc is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Description The runC tool is a lightweight, portable implementation of the Open Container Format (OCF) that provides container runtime. Security Fix(es): crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729) golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121) net/url: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products Red Hat Enterprise Linux Server - AUS 9.2 x86_64 Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.2 ppc64le Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.2 x86_64 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.2 aarch64 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.2 s390x Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.2 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.2 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.2 ppc64le Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.2 s390x Fixes BZ - 2418462 - CVE-2025-61729 crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate BZ - 2434432 - CVE-2025-61726 golang: net/url: Memory exhaustion in query parameter parsing in net/url BZ - 2437111 - CVE-2025-68121 crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption BZ - 2445356 - CVE-2026-25679 net/url: Incorrect parsing of IPv6 host literals in net/url CVEs CVE-2025-61726 CVE-2025-61729 CVE-2025-68121 CVE-2026-25679 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux Server - AUS 9.2 SRPM runc-1.2.9-1.el9_2.2.src.rpm SHA-256: 4b375f64e25548a6a555dd4f2120c014eefd577996cde0cd84b5f0da0a20939b x86_64 runc-1.2.9-1.el9_2.2.x86_64.rpm SHA-256: 9e2c3131574503d2794e06cfd218b7db81ab22761b073fe4e7eeb3b882f9d619 runc-debuginfo-1.2.9-1.el9_2.2.x86_64.rpm SHA-256: 4016ee475759f94ab700bfc6071eec487827b8deefb8b357a3219a9c39153a09 runc-debugsource-1.2.9-1.el9_2.2.x86_64.rpm SHA-256: 42569a6cac6af20fc7834af564db77c4d2d33b82352f95eff9f168b1e5a2f7ce Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.2 SRPM runc-1.2.9-1.el9_2.2.src.rpm SHA-256: 4b375f64e25548a6a555dd4f2120c014eefd577996cde0cd84b5f0da0a20939b ppc64le runc-1.2.9-1.el9_2.2.ppc64le.rpm SHA-256: 3c525a64cf6eb8f69bfcbec8530888fdd7d97833914675bfdf11c1f74dc4d8f2 runc-debuginfo-1.2.9-1.el9_2.2.ppc64le.rpm SHA-256: f941a7c0466bdd5e9f2b04065d44c97898dcccad169e68a1e455e319cc30b2af runc-debugsource-1.2.9-1.el9_2.2.ppc64le.rpm SHA-256: e0f2d9dc9f5ee0da7ac35e8450fc27a84c2e74019a91821b43feb2b6815f5aa4 Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.2 SRPM runc-1.2.9-1.el9_2.2.src.rpm SHA-256: 4b375f64e25548a6a555dd4f2120c014eefd577996cde0cd84b5f0da0a20939b x86_64 runc-1.2.9-1.el9_2.2.x86_64.rpm SHA-256: 9e2c3131574503d2794e06cfd218b7db81ab22761b073fe4e7eeb3b882f9d619 runc-debuginfo-1.2.9-1.el9_2.2.x86_64.rpm SHA-256: 4016ee475759f94ab700bfc6071eec487827b8deefb8b357a3219a9c39153a09 runc-debugsource-1.2.9-1.el9_2.2.x86_64.rpm SHA-256: 42569a6cac6af20fc7834af564db77c4d2d33b82352f95eff9f168b1e5a2f7ce Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.2 SRPM runc-1.2.9-1.el9_2.2.src.rpm SHA-256: 4b375f64e25548a6a555dd4f2120c014eefd577996cde0cd84b5f0da0a20939b aarch64 runc-1.2.9-1.el9_2.2.aarch64.rpm SHA-256: 9809023da1fb4459ee8a8dbb64ac20182490df4cff54088c092b126a3315896a runc-debuginfo-1.2.9-1.el9_2.2.aarch64.rpm SHA-256: 7e04da4bbc67d18d5255fdb6937d0be3e188b012d974e2514146802324e37ce5 runc-debugsource-1.2.9-1.el9_2.2.aarch64.rpm SHA-256: 2a051d84b73c6e9ff0791e2b949563b6ee9aa79cd8808c3b5c81d1ce0ce8ee25 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.2 SRPM runc-1.2.9-1.el9_2.2.src.rpm SHA-256: 4b375f64e25548a6a555dd4f2120c014eefd577996cde0cd84b5f0da0a20939b s390x runc-1.2.9-1.el9_2.2.s390x.rpm SHA-256: dd557924989223070115a985e941b3484da552f456f0d438f817ddd09b6ceb89 runc-debuginfo-1.2.9-1.el9_2.2.s390x.rpm SHA-256: be50b12450641a0e33733e4d7750c8fb03e83e63e74436651d64eee6573fbd19 runc-debugsource-1.2.9-1.el9_2.2.s390x.rpm SHA-256: 7448d552a1f2bc35dedc1665c257f21a08853e4816f8e813a5e7a499a639a076 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.2 SRPM runc-1.2.9-1.el9_2.2.src.rpm SHA-256: 4b375f64e25548a6a555dd4f2120c014eefd577996cde0cd84b5f0da0a20939b x86_64 runc-1.2.9-1.el9_2.2.x86_64.rpm SHA-256: 9e2c3131574503d2794e06cfd218b7db81ab22761b073fe4e7eeb3b882f9d619 runc-debuginfo-1.2.9-1.el9_2.2.x86_64.rpm SHA-256: 4016ee475759f94ab700bfc6071eec487827b8deefb8b357a3219a9c39153a09 runc-debugsource-1.2.9-1.el9_2.2.x86_64.rpm SHA-256: 42569a6cac6af20fc7834af564db77c4d2d33b82352f95eff9f168b1e5a2f7ce Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.2 SRPM runc-1.2.9-1.el9_2.2.src.rpm SHA-256: 4b375f64e25548a6a555dd4f2120c014eefd577996cde0cd84b5f0da0a20939b aarch64 runc-1.2.9-1.el9_2.2.aarch64.rpm SHA-256: 9809023da1fb4459ee8a8dbb64ac20182490df4cff54088c092b126a3315896a runc-debuginfo-1.2.9-1.el9_2.2.aarch64.rpm SHA-256: 7e04da4bbc67d18d5255fdb6937d0be3e188b012d974e2514146802324e37ce5 runc-debugsource-1.2.9-1.el9_2.2.aarch64.rpm SHA-256: 2a051d84b73c6e9ff0791e2b949563b6ee9aa79cd8808c3b5c81d1ce0ce8ee25 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.2 SRPM runc-1.2.9-1.el9_2.2.src.rpm SHA-256: 4b375f64e25548a6a555dd4f2120c014eefd577996cde0cd84b5f0da0a20939b ppc64le runc-1.2.9-1.el9_2.2.ppc64le.rpm SHA-256: 3c525a64cf6eb8f69bfcbec8530888fdd7d97833914675bfdf11c1f74dc4d8f2 runc-debuginfo-1.2.9-1.el9_2.2.ppc64le.rpm SHA-256: f941a7c0466bdd5e9f2b04065d44c97898dcccad169e68a1e455e319cc30b2af runc-debugsource-1.2.9-1.el9_2.2.ppc64le.rpm SHA-256: e0f2d9dc9f5ee0da7ac35e8450fc27a84c2e74019a91821b43feb2b6815f5aa4 Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.2 SRPM runc-1.2.9-1.el9_2.2.src.rpm SHA-256: 4b375f64e25548a6a555dd4f2120c014eefd577996cde0cd84b5f0da0a20939b s390x runc-1.2.9-1.el9_2.2.s390x.rpm SHA-256: dd557924989223070115a985e941b3484da552f456f0d438f817ddd09b6ceb89 runc-debuginfo-1.2.9-1.el9_2.2.s390x.rpm SHA-256: be50b12450641a0e33733e4d7750c8fb03e83e63e74436651d64eee6573fbd19 runc-debugsource-1.2.9-1.el9_2.2.s390x.rpm SHA-256: 7448d552a1f2bc35dedc1665c257f21a08853e4816f8e813a5e7a499a639a076 The Red Hat security contact is secalert@redhat.com . 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