Use after free in gawk
CVE-2026-40467 is fixed in 6 products 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.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| gawk · RHEL 10 | 5.3.0-6.el10_2.1 | RHSA-2026:73429 | Jul 13, 2026 |
| gawk · RHEL 8 | 0:4.2.1-5.el8_10 | RHSA-2026:73511 | Oct 2, 2026 |
| gawk · RHEL 9 | 0:5.1.0-6.el9_8.1 | RHSA-2026:73512 | Sep 30, 2026 |
| 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 |
| gawk · almalinux 10 | 5.3.0-6.el10_2.1 | ALSA-2026:73429 | Sep 29, 2026 |
| gawk · almalinux 8 | 4.2.1-5.el8_10 | ALSA-2026:73511 | Sep 29, 2026 |
| gawk · almalinux 9 | 5.1.0-6.el9_8.1 | ALSA-2026:73512 | Sep 29, 2026 |
| gawk · amzn 2023 | 5.1.0-3.amzn2023.0.4 | ALAS2023-2026-2035 | Aug 3, 2026 |
| gawk · ol 10 | 0:5.3.0-6.el10_2.1 | ELSA-2026-73429 | Sep 30, 2026 |
| gawk · ol 8 | 0:4.2.1-5.el8_10 | ELSA-2026-73511 | Sep 30, 2026 |
| gawk · ol 9 | 0:5.1.0-6.el9_8.1 | ELSA-2026-73512 | Sep 30, 2026 |
| gawk · opensuse-leap 16.0 | 5.3.2-160000.3.1 | OPENSUSE-SU-2026:21393-1 | Jul 20, 2026 |
| gawk · rocky 10 | 0:5.3.0-6.el10_2.1 | RLSA-2026:73429 | Sep 30, 2026 |
| gawk · rocky 8 | 0:4.2.1-5.el8_10 | RLSA-2026:73511 | Oct 2, 2026 |
| gawk · rocky 9 | 0:5.1.0-6.el9_8.1 | RLSA-2026:73512 | Sep 30, 2026 |
| gawk · sles 15.7 | 4.2.1-150000.3.6.1 | SUSE-SU-2026:3455-1 | Aug 3, 2026 |
| gawk · sles 16.0 | 5.3.2-160000.3.1 | SUSE-SU-2026:22831-1 | Jul 20, 2026 |
| gawk-all-langpacks · RHEL 9 | 0:5.1.0-6.el9_8.1 | RHSA-2026:73512 | Sep 30, 2026 |
| gawk-all-langpacks · almalinux 10 | 5.3.0-6.el10_2.1 | ALSA-2026:73429 | Sep 29, 2026 |
| gawk-all-langpacks · almalinux 9 | 5.1.0-6.el9_8.1 | ALSA-2026:73512 | Sep 29, 2026 |
| gawk-all-langpacks · amzn 2023 | 5.1.0-3.amzn2023.0.4 | ALAS2023-2026-2035 | Aug 3, 2026 |
| gawk-all-langpacks · ol 10 | 0:5.3.0-6.el10_2.1 | ELSA-2026-73429 | Sep 30, 2026 |
| gawk-all-langpacks · ol 9 | 0:5.1.0-6.el9_8.1 | ELSA-2026-73512 | Sep 30, 2026 |
| gawk-debuginfo · amzn 2023 | 5.1.0-3.amzn2023.0.4 | ALAS2023-2026-2035 | Aug 3, 2026 |
| gawk-debugsource · amzn 2023 | 5.1.0-3.amzn2023.0.4 | ALAS2023-2026-2035 | Aug 3, 2026 |
| gawk-devel · amzn 2023 | 5.1.0-3.amzn2023.0.4 | ALAS2023-2026-2035 | Aug 3, 2026 |
| gawk-doc · amzn 2023 | 5.1.0-3.amzn2023.0.4 | ALAS2023-2026-2035 | Aug 3, 2026 |
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