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

🗓️ 16 Jul 2026 14:35:59Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 4 Views

Crafted certificate triggers unbounded string concatenation in HostnameError.Error(), causing DoS in Go x509.

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Refs
ReporterTitlePublishedViews
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redhatcve		CVE-2025-61729
11 Dec 202504:50
–redhatcve
redhat		Important: Red Hat Security Advisory: grafana security update
5 Mar 202612:20
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redhat		crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate
5 Mar 202612:20
–redhat
redhat		Important: Red Hat Security Advisory: Red Hat OpenShift GitOps v1.19.2 security update
5 Mar 202612:07
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redhat		Important: Red Hat Security Advisory: OpenShift Container Platform 4.18.35 bug fix and security update
11 Mar 202604:27
–redhat
redhat		Important: Red Hat Security Advisory: git-lfs security update
5 Mar 202616:42
–redhat
redhat		crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate
5 Mar 202616:42
–redhat
redhat		Important: Red Hat Security Advisory: git-lfs security update
5 Mar 202617:28
–redhat
redhat		crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate
5 Mar 202617:28
–redhat
redhat		Important: Red Hat Security Advisory: git-lfs security update
5 Mar 202617:14
–redhat
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9aarch64flightctl-agent1.1.3-1.el9emflightctl-agent-1.1.3-1.el9em.aarch64.rpm
Red Hat Enterprise Linux9ppc64leflightctl-agent1.1.3-1.el9emflightctl-agent-1.1.3-1.el9em.ppc64le.rpm
Red Hat Enterprise Linux9s390xflightctl-agent1.1.3-1.el9emflightctl-agent-1.1.3-1.el9em.s390x.rpm
Red Hat Enterprise Linux9x86_64flightctl-agent1.1.3-1.el9emflightctl-agent-1.1.3-1.el9em.x86_64.rpm
Red Hat Enterprise Linux10aarch64flightctl-agent1.1.3-1.el10emflightctl-agent-1.1.3-1.el10em.aarch64.rpm
Red Hat Enterprise Linux10ppc64leflightctl-agent1.1.3-1.el10emflightctl-agent-1.1.3-1.el10em.ppc64le.rpm
Red Hat Enterprise Linux10s390xflightctl-agent1.1.3-1.el10emflightctl-agent-1.1.3-1.el10em.s390x.rpm
Red Hat Enterprise Linux10x86_64flightctl-agent1.1.3-1.el10emflightctl-agent-1.1.3-1.el10em.x86_64.rpm
Red Hat Enterprise Linux9aarch64flightctl-cli1.1.3-1.el9emflightctl-cli-1.1.3-1.el9em.aarch64.rpm
Red Hat Enterprise Linux9ppc64leflightctl-cli1.1.3-1.el9emflightctl-cli-1.1.3-1.el9em.ppc64le.rpm
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16 Jul 2026 19:41Current
7High risk
Vulners AI Score7
CVSS 3.17.5
EPSS0.00459
SSVC
CWE-1050
crafted certificatehostname errorunbounded concatenationdenial of servicego x509 vulnerability
4