Vulnerability in GNU gawk

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund29 Sep 2026WID-SEC-2026-3649

  Red Hat Enterprise Linux (gawk): Multiple vulnerabilities Translated from German

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

[ References ]References

• cgit.git.savannah.gnu.org/cgit/gawk.git/commitpatch
• cert.pl/en/posts/2026/07/CVE-2026-40467third-party-advisory