RHSA-2026:73429MediumCVSS 6.2

Red Hat Security Advisory: gawk security update

Published
September 29, 2026
Last Modified
October 2, 2026

🔗 CVE IDs covered (3)

CVE-2026-40468 →CVE-2026-40553 →CVE-2026-40467 →

📋 Description

CVE-2026-40467 — gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c CVE-2026-40468 — gawk: gawk: Memory corruption via integer overflow CVE-2026-40553 — gawk: Gawk: Buffer overflow in ftype() routine may lead to code execution or denial of service

🎯 Affected products27

  • Red Hat Enterprise Linux AppStream (v. 10)
  • Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-0:5.3.0-6.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-0:5.3.0-6.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-0:5.3.0-6.el10_2.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-0:5.3.0-6.el10_2.1.src as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-0:5.3.0-6.el10_2.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-all-langpacks-0:5.3.0-6.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-all-langpacks-0:5.3.0-6.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-all-langpacks-0:5.3.0-6.el10_2.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-all-langpacks-0:5.3.0-6.el10_2.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-debuginfo-0:5.3.0-6.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-debuginfo-0:5.3.0-6.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-debuginfo-0:5.3.0-6.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-debuginfo-0:5.3.0-6.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-debuginfo-0:5.3.0-6.el10_2.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-debuginfo-0:5.3.0-6.el10_2.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-debuginfo-0:5.3.0-6.el10_2.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-debuginfo-0:5.3.0-6.el10_2.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-debugsource-0:5.3.0-6.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-debugsource-0:5.3.0-6.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-debugsource-0:5.3.0-6.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-debugsource-0:5.3.0-6.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-debugsource-0:5.3.0-6.el10_2.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-debugsource-0:5.3.0-6.el10_2.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • gawk-debugsource-0:5.3.0-6.el10_2.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • gawk-debugsource-0:5.3.0-6.el10_2.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: To mitigate this issue, users should avoid processing untrusted or maliciously crafted input with `gawk`. Exercise caution when executing `gawk` scripts or commands that process data from unknown or unverified sources. Workaround: Do not execute untrusted awk scripts or process untrusted inputs that could trigger oversized calculations in builtin.c. Workaround: Do not run gawk against untrusted scripts, files, or directories to prevent triggering these vulnerabilities. If an attack is attempted, Red Hat's built-in memory protections will safely crash the program, preventing malicious code execution.

🔗 References (6)