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crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate

🗓️ 19 Mar 2026 05:02:24Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 7 Views

Crafted certificate triggers unbounded string concatenation in HostnameError.Error(), causing denial of service.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.8ppc64lerhc1:0.2.2-1.el8_8.1rhc-1:0.2.2-1.el8_8.1.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64rhc1:0.2.2-1.el8_8.1rhc-1:0.2.2-1.el8_8.1.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lerhc-debuginfo1:0.2.2-1.el8_8.1rhc-debuginfo-1:0.2.2-1.el8_8.1.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64rhc-debuginfo1:0.2.2-1.el8_8.1rhc-debuginfo-1:0.2.2-1.el8_8.1.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lerhc-debugsource1:0.2.2-1.el8_8.1rhc-debugsource-1:0.2.2-1.el8_8.1.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64rhc-debugsource1:0.2.2-1.el8_8.1rhc-debugsource-1:0.2.2-1.el8_8.1.x86_64.rpm

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17 Jul 2026 03:36Current
7.1High risk
Vulners AI Score7.1
CVSS 3.17.5
EPSS0.00459
SSVC
7