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Medium ALSA-2026:73512 3 CVEs

Moderate: gawk security update

Published Sep 29, 2026 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

The gawk packages contain the GNU version of awk, a text processing utility. Awk interprets a special-purpose programming language to do quick and easy text pattern matching and reformatting jobs.

Security Fix(es):

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

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.

Fixed packages 2

ReleasePackageFixed in
AlmaLinux · 9 gawk 5.1.0-6.el9_8.1
AlmaLinux · 9 gawk-all-langpacks 5.1.0-6.el9_8.1

Vulnerabilities 3

  • Medium 5.1
    CVE-2026-40467

    Use after free in gawk

    Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine). This issue may lead to a crash. It affects gawk in versions 5.4.0 and below.

    GNU gawk gawk gawk Debian Ubuntu Azure Linux
  • Medium 5.1
    CVE-2026-40553

    Stack-based buffer overflow in gawk

    Buffer overflow vulnerability has been found in "extension/readdir.c" program file of gawk (ftype() routine). This issue could be used to crash the program and potentially to achieve code execution, although the latter has not been confirmed to be feasible. I…

    GNU gawk gawk gawk Debian Ubuntu Azure Linux
  • Low 2.1
    CVE-2026-40468

    Heap buffer overflow in gawk

    Integer overflow vulnerability has been found in "builtin.c" program file of gawk. This issue may lead to memory exhaustion on the hosting operating system and could be used to overwrite gawk heap metadata and objects with attacker-controlled bytes. It affect…

    GNU gawk gawk gawk Debian Ubuntu Azure Linux

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-40467
  • report
    https://access.redhat.com/security/cve/CVE-2026-40468
  • report
    https://access.redhat.com/security/cve/CVE-2026-40553
  • report
    https://bugzilla.redhat.com/2499655
  • report
    https://bugzilla.redhat.com/2499657
  • report
    https://bugzilla.redhat.com/2499658
  • advisory
    https://errata.almalinux.org/9/ALSA-2026-73512.html