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crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation

🗓️ 23 Apr 2026 21:39:53Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 13 Views

Go crypto/x509 DoS via a certificate chain with many policy mappings causing excessive resource use during validation.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10.1aarch64go-toolset1.25.9-3.el10_1go-toolset-1.25.9-3.el10_1.aarch64.rpm
Red Hat Enterprise Linux10.1ppc64lego-toolset1.25.9-3.el10_1go-toolset-1.25.9-3.el10_1.ppc64le.rpm
Red Hat Enterprise Linux10.1s390xgo-toolset1.25.9-3.el10_1go-toolset-1.25.9-3.el10_1.s390x.rpm
Red Hat Enterprise Linux10.1x86_64go-toolset1.25.9-3.el10_1go-toolset-1.25.9-3.el10_1.x86_64.rpm
Red Hat Enterprise Linux10.1aarch64golang1.25.9-3.el10_1golang-1.25.9-3.el10_1.aarch64.rpm
Red Hat Enterprise Linux10.1ppc64legolang1.25.9-3.el10_1golang-1.25.9-3.el10_1.ppc64le.rpm
Red Hat Enterprise Linux10.1s390xgolang1.25.9-3.el10_1golang-1.25.9-3.el10_1.s390x.rpm
Red Hat Enterprise Linux10.1x86_64golang1.25.9-3.el10_1golang-1.25.9-3.el10_1.x86_64.rpm
Red Hat Enterprise Linux10.1aarch64golang-bin1.25.9-3.el10_1golang-bin-1.25.9-3.el10_1.aarch64.rpm
Red Hat Enterprise Linux10.1ppc64legolang-bin1.25.9-3.el10_1golang-bin-1.25.9-3.el10_1.ppc64le.rpm
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02 Sep 2026 14:58Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.17.5
EPSS0.00355
SSVC
CWE-1050
certificate chainpolicy mappingsdenial of serviceresource usagecertificate validationremote attacker
13