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

🗓️ 20 Jul 2026 16:17:57Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 6 Views

Go cryptography module flaw enables Denial of Service from certificates with many domain name subject alternative name entries during hostname verification.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9aarch64receptor1.6.6-1.el9.apreceptor-1.6.6-1.el9.ap.aarch64.rpm
Red Hat Enterprise Linux9ppc64lereceptor1.6.6-1.el9.apreceptor-1.6.6-1.el9.ap.ppc64le.rpm
Red Hat Enterprise Linux9s390xreceptor1.6.6-1.el9.apreceptor-1.6.6-1.el9.ap.s390x.rpm
Red Hat Enterprise Linux9x86_64receptor1.6.6-1.el9.apreceptor-1.6.6-1.el9.ap.x86_64.rpm
Red Hat Enterprise Linux10aarch64receptor1.6.6-1.el10.apreceptor-1.6.6-1.el10.ap.aarch64.rpm
Red Hat Enterprise Linux10ppc64lereceptor1.6.6-1.el10.apreceptor-1.6.6-1.el10.ap.ppc64le.rpm
Red Hat Enterprise Linux10s390xreceptor1.6.6-1.el10.apreceptor-1.6.6-1.el10.ap.s390x.rpm
Red Hat Enterprise Linux10x86_64receptor1.6.6-1.el10.apreceptor-1.6.6-1.el10.ap.x86_64.rpm

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24 Jul 2026 11:37Current
7.2High risk
Vulners AI Score7.2
CVSS 3.17.5
EPSS0.00939
SSVC
6