VDB
RHSA-2026:54500
RHSA-2026:54500
PUBLISHED
CVSS 7.5 HIGH
A flaw was found in the `crypto/x509` package of `golang`. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name (SAN) entries. The certificate verification process, specifically the `VerifyHostname` function, incurs excessive computational overhead due to repeated string operations when processing these entries. This can lead to a significant performance degradation or unresponsiveness of systems validating such certificates.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | registry.redhat.io/compliance/openshift-compliance-openscap-rhel8@sha256:88163c2079ef72fc3d4d862b0ee00e67b5daed69efea36c1add970c86fec098b_ppc64le as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-content-rhel8@sha256:3abf963f35712afd8fe476e32b1f9f3318b0e1d84f5d6e31059fa439baed2afd_arm64 as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-openscap-rhel8@sha256:10920bf717fb38a7b6e3f30605b4f21f27e7263304b4aee2b2f54c65c875b823_amd64 as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-rhel8-operator@sha256:971ded98dfecc78d23a4e6cf3370918b3293c1fae1098f7bf1f97437895b9b79_arm64 as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-must-gather-rhel8@sha256:a01373b1502c4422ac2d749b349128cbe474c8ebe9259bd16531a010e80cc499_ppc64le as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-content-rhel8@sha256:a9831e3a9099684b681fe9db5ee3319b5694aaa2e18728bc1f5f646843b4593a_s390x as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-content-rhel8@sha256:8823d451e5cc3925e0b3b08f62ae44db0b98ed616f2bc12a34a21055245fac26_amd64 as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-openscap-rhel8@sha256:ab42a8cf28e8d99b1a00236c2f3b135bc410d0b923d9da6d82bc8f9fb0983d55_s390x as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-must-gather-rhel8@sha256:5c8a3c4145373a8692dafef3a2c4d7d234833f0cf088d835a27d4d6047f38c81_amd64 as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-rhel8-operator@sha256:d5ef91916dfe6d39b74ffaa8e21eaf681580668616ecfda2aabe7feec7b0a8e1_s390x as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-content-rhel8@sha256:0e92582024f42a1e8836b6e5bd0e8125c4f90345019febb01aef3fc3d18819eb_ppc64le as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-openscap-rhel8@sha256:74009399da69bf6e4cf73acd8dab59e75a9113d3445731e3278e2c4f532448e9_arm64 as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-rhel8-operator@sha256:3680c7063c60ba00998a6bfdf4598d7938e365eb9e736be7ce369df04489d987_ppc64le as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-rhel8-operator@sha256:c240c2c93f0ecec98896bec956beb5b50deb8e5d20792cbcbe055e76b7587de1_amd64 as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-operator-bundle@sha256:bfe946d2878a37624641a92ed538c77861c355fb4a44a387944d988feca7ca95_amd64 as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-must-gather-rhel8@sha256:52ec7d078b31a8b8c4a465414ffc9f3071f05d31d7463c008520606ea0e5eba2_s390x as a component of OpenShift Compliance Operator 1 | * |
| Red Hat | registry.redhat.io/compliance/openshift-compliance-must-gather-rhel8@sha256:533549b13f642dae060e2f280d1e95fd74e614629323207e7072555d44f741cb_arm64 as a component of OpenShift Compliance Operator 1 | * |
Timeline
- Aug 13, 2026 CVE Published
- Aug 21, 2026 CVE Updated
- Aug 21, 2026 Distribution Patch
- Aug 21, 2026 Distribution Patch
- Aug 21, 2026 Security Advisory
- Aug 21, 2026 Security Advisory
- Aug 21, 2026 Security Advisory
- Aug 21, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:54500 advisory
- https://access.redhat.com/security/cve/CVE-2026-27145 advisory
- https://access.redhat.com/security/cve/CVE-2026-33811 advisory
- https://access.redhat.com/security/cve/CVE-2026-42504 advisory
- https://access.redhat.com/security/updates/classification/ advisory
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_54500.json advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2484207 issue
- https://www.cve.org/CVERecord?id=CVE-2026-27145 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-27145 advisory
- https://go.dev/cl/783621 advisory
- https://go.dev/issue/79694 advisory
- https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw advisory
- https://pkg.go.dev/vuln/GO-2026-5037 advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2467822 issue
- https://www.cve.org/CVERecord?id=CVE-2026-33811 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-33811 advisory
- https://go.dev/cl/767860 advisory
- https://go.dev/issue/78803 advisory
- https://groups.google.com/g/golang-announce/c/qcCIEXso47M advisory
- https://pkg.go.dev/vuln/GO-2026-4981 advisory
…and 6 more