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crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries

🗓️ 06 Aug 2026 18:23:44Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 9 Views

DoS in Go crypto/x509 VerifyHostname caused by many DNS SANs causing heavy processing.

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Red Hat Enterprise Linux10.0aarch64yggdrasil-debuginfo0.4.7-5.el10_0yggdrasil-debuginfo-0.4.7-5.el10_0.aarch64.rpm
Red Hat Enterprise Linux10.0ppc64leyggdrasil-debuginfo0.4.7-5.el10_0yggdrasil-debuginfo-0.4.7-5.el10_0.ppc64le.rpm
Red Hat Enterprise Linux10.0s390xyggdrasil-debuginfo0.4.7-5.el10_0yggdrasil-debuginfo-0.4.7-5.el10_0.s390x.rpm
Red Hat Enterprise Linux10.0x86_64yggdrasil-debuginfo0.4.7-5.el10_0yggdrasil-debuginfo-0.4.7-5.el10_0.x86_64.rpm
Red Hat Enterprise Linux10.0aarch64yggdrasil-debugsource0.4.7-5.el10_0yggdrasil-debugsource-0.4.7-5.el10_0.aarch64.rpm
Red Hat Enterprise Linux10.0ppc64leyggdrasil-debugsource0.4.7-5.el10_0yggdrasil-debugsource-0.4.7-5.el10_0.ppc64le.rpm
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10 Aug 2026 09:21Current
7.2High risk
Vulners AI Score7.2
CVSS 3.17.5
EPSS0.00591
SSVC
9