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

🗓️ 01 Jul 2026 19:33:39Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 8 Views

DoS in Go crypto/x509 VerifyHostname from certificates with many DNS SAN entries.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.8aarch64opentelemetry-collector0.152.1-1.el9_8opentelemetry-collector-0.152.1-1.el9_8.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64leopentelemetry-collector0.152.1-1.el9_8opentelemetry-collector-0.152.1-1.el9_8.ppc64le.rpm
Red Hat Enterprise Linux9.8s390xopentelemetry-collector0.152.1-1.el9_8opentelemetry-collector-0.152.1-1.el9_8.s390x.rpm
Red Hat Enterprise Linux9.8x86_64opentelemetry-collector0.152.1-1.el9_8opentelemetry-collector-0.152.1-1.el9_8.x86_64.rpm

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19 Jul 2026 02:07Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.5
EPSS0.00939
SSVC
8