VDB

RHSA-2026:53374

RHSA-2026:53374 PUBLISHED CVSS 8.199999809265137 HIGH

Record from redhat · Published August 11, 2026

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
8.199999809265137
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected products

VendorProductVersions
Red Hatrhc-debuginfo-1:0.3.2-5.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-debuginfo-1:0.3.2-5.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-debugsource-1:0.3.2-5.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-1:0.3.2-5.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-debuginfo-1:0.3.2-5.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-1:0.3.2-5.el10_0.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-1:0.3.2-5.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-debugsource-1:0.3.2-5.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-debugsource-1:0.3.2-5.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-1:0.3.2-5.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-1:0.3.2-5.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-debuginfo-1:0.3.2-5.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0
Red Hatrhc-debugsource-1:0.3.2-5.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)1:0.3.2-5.el10_0

Timeline

  • Aug 11, 2026 CVE Published
  • Aug 12, 2026 CVE Updated
  • Aug 12, 2026 Distribution Patch (2 in total, the first dated here)
  • Aug 12, 2026 Security Advisory (3 in total, the first dated here)

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln RHSA-2026:53374
vulnetix vdb fixes RHSA-2026:53374

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/RHSA-2026%3A53374/fixes/registry"

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References

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