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

🗓️ 20 Jul 2026 11:31:40Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 5 Views

crypto/x509 VerifyHostname DoS from heavy processing of Domain Name Subject Alternative Name entries.

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Red Hat Enterprise Linux8.10ppc64lerhc1:0.2.5-9.el8_10rhc-1:0.2.5-9.el8_10.ppc64le.rpm
Red Hat Enterprise Linux8.10s390xrhc1:0.2.5-9.el8_10rhc-1:0.2.5-9.el8_10.s390x.rpm
Red Hat Enterprise Linux8.10x86_64rhc1:0.2.5-9.el8_10rhc-1:0.2.5-9.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10aarch64rhc-debuginfo1:0.2.5-9.el8_10rhc-debuginfo-1:0.2.5-9.el8_10.aarch64.rpm
Red Hat Enterprise Linux8.10ppc64lerhc-debuginfo1:0.2.5-9.el8_10rhc-debuginfo-1:0.2.5-9.el8_10.ppc64le.rpm
Red Hat Enterprise Linux8.10s390xrhc-debuginfo1:0.2.5-9.el8_10rhc-debuginfo-1:0.2.5-9.el8_10.s390x.rpm
Red Hat Enterprise Linux8.10x86_64rhc-debuginfo1:0.2.5-9.el8_10rhc-debuginfo-1:0.2.5-9.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10aarch64rhc-debugsource1:0.2.5-9.el8_10rhc-debugsource-1:0.2.5-9.el8_10.aarch64.rpm
Red Hat Enterprise Linux8.10ppc64lerhc-debugsource1:0.2.5-9.el8_10rhc-debugsource-1:0.2.5-9.el8_10.ppc64le.rpm
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20 Jul 2026 23:30Current
7.2High risk
Vulners AI Score7.2
CVSS 3.17.5
EPSS0.00939
SSVC
5