Buffer overflow in Fossies Gawk
CVE-2026-40553
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.
Vulnerability class: Buffer Overflow
EPSS: 0.003 (21.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Fossies Gawk
- Gnu Gawk — versions 0
Weakness classification (CWE)
References
- cvd@cert.pl (Patch, patch)
- cvd@cert.pl (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-40553?
- CVE-2026-40553 is a high-severity vulnerability in Fossies Gawk, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-07-13.
- How severe is CVE-2026-40553?
- High severity. CVSS v3 base score is 7.5 out of 10.