gawk: Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine)
CVE-2026-40469 is fixed in gawk on 1 platform, first by gawk 1:5.3.2-1ubuntu1.1, released July 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine). This issue could be used to overwrite gawk heap metadata and objects causing the program to crash. It affects 32-bit builds of gawk in versions 5.4.0 and below.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| gawk · Ubuntu 18.04.6 LTS (bionic) | 1:4.1.4+dfsg-1ubuntu0.1~esm2 | gawk 1:4.1.4+dfsg-1ubuntu0.1~esm2 | Jul 24, 2026 |
| gawk · Ubuntu 20.04 LTS (focal) | 1:5.0.1+dfsg-1ubuntu0.1+esm1 | gawk 1:5.0.1+dfsg-1ubuntu0.1+esm1 | Jul 24, 2026 |
| gawk · Ubuntu 22.04.1 LTS (jammy) | 1:5.1.0-1ubuntu0.2 | gawk 1:5.1.0-1ubuntu0.2 | Jul 24, 2026 |
| gawk · Ubuntu 24.04.5 LTS (noble) | 1:5.2.1-2ubuntu0.1 | gawk 1:5.2.1-2ubuntu0.1 | Jul 24, 2026 |
| gawk · Ubuntu 26.04.1 LTS (resolute) | 1:5.3.2-1ubuntu1.1 | gawk 1:5.3.2-1ubuntu1.1 | Jul 13, 2026 |
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