RHSA-2026:70640HighCVSS 8.1

Red Hat Security Advisory: buildah security update

Published
September 24, 2026
Last Modified
October 5, 2026

🔗 CVE IDs covered (8)

CVE-2026-56853 →CVE-2026-56855 →CVE-2026-56858 →CVE-2026-56860 →CVE-2026-56862 →CVE-2025-11395 →CVE-2026-15789 →CVE-2026-33818 →

📋 Description

CVE-2025-11395 — podman: Arbitrary file write when importing OCI archive CVE-2026-15789 — buildkit: github.com/moby/buildkit: BuildKit: File escape vulnerability CVE-2026-33818 — encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal CVE-2026-56853 — net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service CVE-2026-56855 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted messages CVE-2026-56858 — html/template: golang: Go html/template: Cross-Site Scripting via pathological input CVE-2026-56860 — net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution CVE-2026-56862 — crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages

🎯 Affected products22

  • Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-2:1.43.3-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-2:1.43.3-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-2:1.43.3-2.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-2:1.43.3-2.el9_8.src as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-2:1.43.3-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-debuginfo-2:1.43.3-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-debuginfo-2:1.43.3-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-debuginfo-2:1.43.3-2.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-debuginfo-2:1.43.3-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-debugsource-2:1.43.3-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-debugsource-2:1.43.3-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-debugsource-2:1.43.3-2.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-debugsource-2:1.43.3-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-tests-2:1.43.3-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-tests-2:1.43.3-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-tests-2:1.43.3-2.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-tests-2:1.43.3-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-tests-debuginfo-2:1.43.3-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-tests-debuginfo-2:1.43.3-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-tests-debuginfo-2:1.43.3-2.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • buildah-tests-debuginfo-2:1.43.3-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)

✅ Remediation

Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: Red Hat is not aware of a practical mitigation that fully prevents this issue while maintaining affected SSH functionality. Where operationally possible, restrict SSH connectivity to trusted systems. Apply relevant Red Hat updates when they become available.

🔗 References (8)