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

🗓️ 11 Aug 2026 12:10:30Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 7 Views

golang crypto/x509 VerifyHostname DoS via excessive DNS SAN entries in crafted certificates.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7.9ppc64lehost-metering1.4.0-8.el7_9host-metering-1.4.0-8.el7_9.ppc64le.rpm
Red Hat Enterprise Linux7.9x86_64host-metering1.4.0-8.el7_9host-metering-1.4.0-8.el7_9.x86_64.rpm
Red Hat Enterprise Linux7.9ppc64lehost-metering-debuginfo1.4.0-8.el7_9host-metering-debuginfo-1.4.0-8.el7_9.ppc64le.rpm
Red Hat Enterprise Linux7.9x86_64host-metering-debuginfo1.4.0-8.el7_9host-metering-debuginfo-1.4.0-8.el7_9.x86_64.rpm
Red Hat Enterprise Linux7.9ppc64lehost-metering-debugsource1.4.0-8.el7_9host-metering-debugsource-1.4.0-8.el7_9.ppc64le.rpm
Red Hat Enterprise Linux7.9x86_64host-metering-debugsource1.4.0-8.el7_9host-metering-debugsource-1.4.0-8.el7_9.x86_64.rpm
Red Hat Enterprise Linux7.9noarchhost-metering-selinux1.4.0-8.el7_9host-metering-selinux-1.4.0-8.el7_9.noarch.rpm

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20 Aug 2026 20:50Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.17.5
EPSS0.00591
SSVC
7