CVE-2026-40553 | THREATINT

Description

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. It affects gawk in versions 5.4.0 and below.

PUBLISHED Reserved 2026-04-14 | Published 2026-07-13 | Updated 2026-07-13 | Assigner CERT-PL

MEDIUM: 5.1CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L

Problem types

CWE-121 Stack-based Buffer Overflow

Product status

Default status

unaffected

Any version

affected

Credits

Michał Majchrowicz (AFINE) finder

Marcin Wyczechowski (AFINE) finder

References

cgit.git.savannah.gnu.org/...4336b49aaa7d5d949966ce8e2c70843 patch

cert.pl/en/posts/2026/07/CVE-2026-40467 third-party-advisory

cve.org (CVE-2026-40553)

nvd.nist.gov (CVE-2026-40553)

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