PT-2026-57814 · Gawk · Gawk

Marcin Wyczechowski + 1 · Published 2026-07-13 · Updated 2026-07-13 · CVE-2026-40469

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Name of the Vulnerable Software and Affected Versions gawk versions 5.4.0 and earlier (32-bit builds)

Description An integer overflow exists in the do sub() routine within the builtin.c file. This flaw allows for the overwriting of heap metadata and objects, which can lead to a program crash. An integer overflow occurs when an arithmetic operation attempts to create a numeric value that is outside of the range that can be represented with a given number of bits.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2026-40469

Affected Products

Gawk

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-40469 · Security Note
• https://cgit.git.savannah.gnu.org/cgit/gawk.git/commit/?id=ae1b2d508f46913269a9e62aceda3636afe8147b · Patch
• https://cert.pl/en/posts/2026/07/CVE-2026-40467 · Note
• https://twitter.com/infoflowcloud/status/2076723676427268240 · Twitter Post
• https://twitter.com/CVEnew/status/2076722755223834639 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2076752507070484948 · Twitter Post