What is CVE-2026-40467?

CVE-2026-40467 is a high-severity vulnerability in Fossies Gawk, classified under Use After Free. CVSS score: 7.5/10. Published 2026-07-13.

How severe is CVE-2026-40467?

High severity. CVSS v3 base score is 7.5 out of 10.

Use After Free in Fossies Gawk

CVE-2026-40467

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.

Vulnerability class: Use-After-Free

EPSS: 0.002 (11.5th 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)

CWE-416 — Use After Free

References

cvd@cert.pl (Patch, patch)
cvd@cert.pl (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-40467?: CVE-2026-40467 is a high-severity vulnerability in Fossies Gawk, classified under Use After Free. CVSS score: 7.5/10. Published 2026-07-13.
How severe is CVE-2026-40467?: High severity. CVSS v3 base score is 7.5 out of 10.