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crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages

🗓️ 03 Aug 2026 06:37:01Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 2 Views

Go crypto/tls TLS 1.3 key update DoS allows an attacker to send multiple updates after handshake, causing deadlock.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.2aarch64rhc1:0.2.2-1.el9_2.3rhc-1:0.2.2-1.el9_2.3.aarch64.rpm
Red Hat Enterprise Linux9.2ppc64lerhc1:0.2.2-1.el9_2.3rhc-1:0.2.2-1.el9_2.3.ppc64le.rpm
Red Hat Enterprise Linux9.2s390xrhc1:0.2.2-1.el9_2.3rhc-1:0.2.2-1.el9_2.3.s390x.rpm
Red Hat Enterprise Linux9.2x86_64rhc1:0.2.2-1.el9_2.3rhc-1:0.2.2-1.el9_2.3.x86_64.rpm
Red Hat Enterprise Linux9.2aarch64rhc-debuginfo1:0.2.2-1.el9_2.3rhc-debuginfo-1:0.2.2-1.el9_2.3.aarch64.rpm
Red Hat Enterprise Linux9.2ppc64lerhc-debuginfo1:0.2.2-1.el9_2.3rhc-debuginfo-1:0.2.2-1.el9_2.3.ppc64le.rpm
Red Hat Enterprise Linux9.2s390xrhc-debuginfo1:0.2.2-1.el9_2.3rhc-debuginfo-1:0.2.2-1.el9_2.3.s390x.rpm
Red Hat Enterprise Linux9.2x86_64rhc-debuginfo1:0.2.2-1.el9_2.3rhc-debuginfo-1:0.2.2-1.el9_2.3.x86_64.rpm
Red Hat Enterprise Linux9.2aarch64rhc-debugsource1:0.2.2-1.el9_2.3rhc-debugsource-1:0.2.2-1.el9_2.3.aarch64.rpm
Red Hat Enterprise Linux9.2ppc64lerhc-debugsource1:0.2.2-1.el9_2.3rhc-debugsource-1:0.2.2-1.el9_2.3.ppc64le.rpm
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03 Aug 2026 13:16Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.17.5
EPSS0.00621
SSVC
2