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

🗓️ 06 Jul 2026 03:20:26Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 8 Views

Remote attacker can cause denial of service with many domain name entries in Go crypto/x509 VerifyHostname.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10.2aarch64ipp-usb0.9.27-7.el10_2.2ipp-usb-0.9.27-7.el10_2.2.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64leipp-usb0.9.27-7.el10_2.2ipp-usb-0.9.27-7.el10_2.2.ppc64le.rpm
Red Hat Enterprise Linux10.2s390xipp-usb0.9.27-7.el10_2.2ipp-usb-0.9.27-7.el10_2.2.s390x.rpm
Red Hat Enterprise Linux10.2x86_64ipp-usb0.9.27-7.el10_2.2ipp-usb-0.9.27-7.el10_2.2.x86_64.rpm

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17 Jul 2026 11:25Current
6Medium risk
Vulners AI Score6
CVSS 3.17.5
EPSS0.00939
SSVC
8