RHSA-2026:29702 — Security Advisory
Red Hat Security Advisory: runc security update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · June 25, 2026
Updated · November 4, 2026
Topic
An update for runc is now available for Red Hat Enterprise Linux 9.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The runC tool is a lightweight, portable implementation of the Open Container Format (OCF) that provides container runtime.
Security Fix(es):
-
net/url: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679)
-
crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281)
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crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.