Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GNU | gawk | ≤ 5.4.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | gawk | No fix yet | — |
| Debian 13 | gawk | No fix yet | — |
| Debian 12 | gawk | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | gawk | 1:5.3.2-1ubuntu1.1 | USN-8588-1 |
| Ubuntu 24.04 LTS | gawk | 1:5.2.1-2ubuntu0.1 | USN-8588-1 |
| Ubuntu 22.04 LTS | gawk | 1:5.1.0-1ubuntu0.2 | USN-8588-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | gawk | 1:5.0.1+dfsg-1ubuntu0.1+esm1 | USN-8588-1 |
| Ubuntu Pro 18.04 LTS | gawk | 1:4.1.4+dfsg-1ubuntu0.1~esm2 | USN-8588-1 |
| Ubuntu Pro 16.04 LTS | gawk | 1:4.1.3+dfsg-0.1ubuntu0.1~esm2 | USN-8588-1 |
| Ubuntu Pro 14.04 LTS | gawk | 1:4.0.1+dfsg-2.1ubuntu2+esm2 | USN-8588-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | gawk +1 | 5.3.0-6.el10_2.1 | RHSA-2026:73429 |
| RHEL 9 | gawk +1 | 5.1.0-6.el9_8.1 | RHSA-2026:73512 |
| RHEL 8 | gawk | 4.2.1-5.el8_10 | RHSA-2026:73511 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | gawk +3 | 5.4.0-3.1.hum1 | RHSA-2026:49661, RHSA-2026:40041 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | gawk +1 | 5.3.0-6.el10_2.1 | ALSA-2026:73429 |
| AlmaLinux 9 | gawk +1 | 5.1.0-6.el9_8.1 | ALSA-2026:73512 |
| AlmaLinux 8 | gawk | 4.2.1-5.el8_10 | ALSA-2026:73511 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | gawk | 5.3.0-6.el10_2.1 | RLSA-2026:73429 |
| Rocky Linux 9 | gawk | 5.1.0-6.el9_8.1 | RLSA-2026:73512 |
| Rocky Linux 8 | gawk | 4.2.1-5.el8_10 | RLSA-2026:73511 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | gawk | 4.2.1-150000.3.6.1 | SUSE-SU-2026:3455-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | gawk | 5.3.2-160000.3.1 | SUSE-SU-2026:22831-1 |
| SLES 16.0 | gawk | 5.3.2-160000.3.1 | SUSE-SU-2026:22831-1 |
| SLE Micro 6.2 | gawk | 5.3.2-160000.3.1 | SUSE-SU-2026:22767-1 |
| SLE Micro 6.0 | gawk | 5.3.0-2.1 | SUSE-SU-2026:23042-1 |
| SLE Micro 5.5 | gawk | 4.2.1-150000.3.6.1 | SUSE-SU-2026:3455-1 |
| SLE Micro 5.4 | gawk | 4.2.1-150000.3.6.1 | SUSE-SU-2026:3455-1 |
| SLE Micro 5.3 | gawk | 4.2.1-150000.3.6.1 | SUSE-SU-2026:3455-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | gawk | 5.3.2-160000.3.1 | openSUSE-SU-2026:21393-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | gawk +3 | 5.1.0-3.amzn2023.0.4 | ALAS2023-2026-2035 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | gawk | 5.2.2-2 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | gawk +1 | 5.3.0-6.el10_2.1 | ELSA-2026-73429 |
| Oracle Linux 9 | gawk +1 | 5.1.0-6.el9_8.1 | ELSA-2026-73512 |
| Oracle Linux 8 | gawk | 4.2.1-5.el8_10 | ELSA-2026-73511 |
Advisories 22
- WID-SEC-2026-3649 Red Hat Enterprise Linux (gawk): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 4, 2026
- ALSA-2026:73512 Moderate: gawk security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:73429 Moderate: gawk security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:73511 Moderate: gawk security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:73512 Red Hat Security Advisory: gawk security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:73511 Red Hat Security Advisory: gawk security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:73429 Red Hat Security Advisory: gawk security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:49661 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:40041 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RLSA-2026:73511 Moderate: gawk security update Rocky Linux Security Advisories · Oct 2, 2026
- RLSA-2026:73429 Moderate: gawk security update Rocky Linux Security Advisories · Sep 30, 2026
- RLSA-2026:73512 Moderate: gawk security update Rocky Linux Security Advisories · Sep 30, 2026
- ELSA-2026-73429 Moderate: gawk security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Sep 30, 2026
- ELSA-2026-73512 Moderate: gawk security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Sep 30, 2026
- ELSA-2026-73511 Moderate: gawk security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 30, 2026
- SUSE-SU-2026:23042-1 Security update for gawk SUSE / openSUSE Security Updates · Aug 12, 2026
- SUSE-SU-2026:3455-1 Security update for gawk SUSE / openSUSE Security Updates · Aug 4, 2026
- ALAS2023-2026-2035 Important: gawk security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 4, 2026
- SUSE-SU-2026:22831-1 Security update for gawk SUSE / openSUSE Security Updates · Jul 28, 2026
- openSUSE-SU-2026:21393-1 Security update for gawk SUSE / openSUSE Security Updates · Jul 24, 2026
- SUSE-SU-2026:22767-1 Security update for gawk SUSE / openSUSE Security Updates · Jul 23, 2026
- USN-8588-1 gawk vulnerabilities Ubuntu Security Notices (USN) · Jul 23, 2026