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

🗓️ 11 Aug 2026 11:39:40Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 8 Views

Go crypto/x509 DoS via crafted X.509 cert with many DNS SAN entries in VerifyHostname.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10.0aarch64opentelemetry-collector0.152.1-1.el10_0opentelemetry-collector-0.152.1-1.el10_0.aarch64.rpm
Red Hat Enterprise Linux10.0ppc64leopentelemetry-collector0.152.1-1.el10_0opentelemetry-collector-0.152.1-1.el10_0.ppc64le.rpm
Red Hat Enterprise Linux10.0s390xopentelemetry-collector0.152.1-1.el10_0opentelemetry-collector-0.152.1-1.el10_0.s390x.rpm
Red Hat Enterprise Linux10.0x86_64opentelemetry-collector0.152.1-1.el10_0opentelemetry-collector-0.152.1-1.el10_0.x86_64.rpm

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21 Aug 2026 17:59Current
8.3High risk
Vulners AI Score8.3
CVSS 3.17.5
EPSS0.00591
SSVC
8