Important: runc security update
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) * 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.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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) * 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.
05 / REFERENCES
Further evidence
- https://access.redhat.com/errata/RHSA-2026:29702
- https://access.redhat.com/security/cve/CVE-2026-25679
- https://access.redhat.com/security/cve/CVE-2026-32280
- https://access.redhat.com/security/cve/CVE-2026-32281
- https://bugzilla.redhat.com/2445356
- https://bugzilla.redhat.com/2456333
- https://bugzilla.redhat.com/2456339
- https://errata.almalinux.org/9/ALSA-2026-29702.html