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crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption

🗓️ 09 Apr 2026 08:35:05Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 4 Views

TLS session resumption may bypass certificate validation when certificate authority settings change between handshakes.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9aarch64skopeo2:1.16.1-5.rhaos4.18.el9skopeo-2:1.16.1-5.rhaos4.18.el9.aarch64.rpm
Red Hat Enterprise Linux9ppc64leskopeo2:1.16.1-5.rhaos4.18.el9skopeo-2:1.16.1-5.rhaos4.18.el9.ppc64le.rpm
Red Hat Enterprise Linux9s390xskopeo2:1.16.1-5.rhaos4.18.el9skopeo-2:1.16.1-5.rhaos4.18.el9.s390x.rpm
Red Hat Enterprise Linux9x86_64skopeo2:1.16.1-5.rhaos4.18.el9skopeo-2:1.16.1-5.rhaos4.18.el9.x86_64.rpm
Red Hat Enterprise Linux9aarch64skopeo-debuginfo2:1.16.1-5.rhaos4.18.el9skopeo-debuginfo-2:1.16.1-5.rhaos4.18.el9.aarch64.rpm
Red Hat Enterprise Linux9ppc64leskopeo-debuginfo2:1.16.1-5.rhaos4.18.el9skopeo-debuginfo-2:1.16.1-5.rhaos4.18.el9.ppc64le.rpm
Red Hat Enterprise Linux9s390xskopeo-debuginfo2:1.16.1-5.rhaos4.18.el9skopeo-debuginfo-2:1.16.1-5.rhaos4.18.el9.s390x.rpm
Red Hat Enterprise Linux9x86_64skopeo-debuginfo2:1.16.1-5.rhaos4.18.el9skopeo-debuginfo-2:1.16.1-5.rhaos4.18.el9.x86_64.rpm
Red Hat Enterprise Linux9aarch64skopeo-debugsource2:1.16.1-5.rhaos4.18.el9skopeo-debugsource-2:1.16.1-5.rhaos4.18.el9.aarch64.rpm
Red Hat Enterprise Linux9ppc64leskopeo-debugsource2:1.16.1-5.rhaos4.18.el9skopeo-debugsource-2:1.16.1-5.rhaos4.18.el9.ppc64le.rpm
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13 Jul 2026 23:33Current
7.1High risk
Vulners AI Score7.1
CVSS 3.19.1 - 10
EPSS0.00765
SSVC
certificate validationsession resumptioncertificate authorityauthentication bypasssecurity flawunix
4