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

🗓️ 13 Jul 2026 16:15:24Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 5 Views

DoS vulnerability in Go crypto/x509 VerifyHostname due to many DNS SAN entries causing heavy processing.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB		CVE-2026-27145
2 Jun 202622:01
–attackerkb
Tenable Nessus		Amazon Linux 2023 : golist (ALAS2023-2026-1874)
22 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : compat-golang-github-cpuguy83-md2man-2-devel, golang-github-cpuguy83-md2man, golang-github-cpuguy83-md2man-devel (ALAS2023-2026-1875)
22 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : golang-github-burntsushi-toml-test, golang-github-burntsushi-toml-test-devel (ALAS2023-2026-1876)
22 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : golang-github-burntsushi-toml, golang-github-burntsushi-toml-devel (ALAS2023-2026-1877)
22 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : golang, golang-bin, golang-misc (ALAS2023-2026-1878)
22 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : soci-snapshotter (ALAS2023-2026-1884)
22 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : credentials-fetcher (ALAS2023-2026-1885)
22 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : golist, --advisory ALAS2-2026-3382 (ALAS-2026-3382)
22 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : golang, --advisory ALAS2-2026-3383 (ALAS-2026-3383)
22 Jun 202600:00
–nessus
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10.2aarch64rhc1:0.3.8-6.el10_2rhc-1:0.3.8-6.el10_2.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64lerhc1:0.3.8-6.el10_2rhc-1:0.3.8-6.el10_2.ppc64le.rpm
Red Hat Enterprise Linux10.2s390xrhc1:0.3.8-6.el10_2rhc-1:0.3.8-6.el10_2.s390x.rpm
Red Hat Enterprise Linux10.2x86_64rhc1:0.3.8-6.el10_2rhc-1:0.3.8-6.el10_2.x86_64.rpm
Red Hat Enterprise Linux10.2aarch64rhc-debuginfo1:0.3.8-6.el10_2rhc-debuginfo-1:0.3.8-6.el10_2.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64lerhc-debuginfo1:0.3.8-6.el10_2rhc-debuginfo-1:0.3.8-6.el10_2.ppc64le.rpm
Red Hat Enterprise Linux10.2s390xrhc-debuginfo1:0.3.8-6.el10_2rhc-debuginfo-1:0.3.8-6.el10_2.s390x.rpm
Red Hat Enterprise Linux10.2x86_64rhc-debuginfo1:0.3.8-6.el10_2rhc-debuginfo-1:0.3.8-6.el10_2.x86_64.rpm
Red Hat Enterprise Linux10.2aarch64rhc-debugsource1:0.3.8-6.el10_2rhc-debugsource-1:0.3.8-6.el10_2.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64lerhc-debugsource1:0.3.8-6.el10_2rhc-debugsource-1:0.3.8-6.el10_2.ppc64le.rpm
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14 Jul 2026 18:04Current
6.9Medium risk
Vulners AI Score6.9
CVSS 3.17.5
EPSS0.00939
SSVC
CWE-606
go languagecrypto x509dns san entrieshostname verificationdenial of service
5