Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() 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.
AI Analysis
Technical Summary
The vulnerability is an integer overflow in the do_sub() routine of the builtin.c source file in gawk. This overflow can corrupt heap metadata and objects, resulting in a program crash. The issue specifically affects 32-bit builds of gawk versions 5.4.0 and earlier. The vulnerability does not require user interaction or privileges and has a low attack vector (local).
Potential Impact
Successful exploitation can cause the gawk program to crash due to heap corruption. There is no indication of code execution or privilege escalation. The impact is limited to denial of service via application crash.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch links or official fixes are provided, users should monitor Ubuntu security advisories for updates addressing this issue. Until a patch is available, avoid running vulnerable 32-bit gawk builds in untrusted environments.
Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine).
Description
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.
CVSS v4.0
Affected software
pkg:deb/ubuntu/gawk@1:4.0.1+dfsg-2.1ubuntu2+esm1?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/gawk@1:4.1.3+dfsg-0.1ubuntu0.1~esm1?arch=source&distro=esm-infra/xenialpkg:deb/ubuntu/gawk@1:4.1.4+dfsg-1ubuntu0.1~esm1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/gawk@1:5.0.1+dfsg-1ubuntu0.1?arch=source&distro=focalpkg:deb/ubuntu/gawk@1:5.1.0-1ubuntu0.1?arch=source&distro=jammypkg:deb/ubuntu/gawk@1:5.2.1-2build3?arch=source&distro=noblepkg:deb/ubuntu/gawk@1:5.3.2-1ubuntu1?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability is an integer overflow in the do_sub() routine of the builtin.c source file in gawk. This overflow can corrupt heap metadata and objects, resulting in a program crash. The issue specifically affects 32-bit builds of gawk versions 5.4.0 and earlier. The vulnerability does not require user interaction or privileges and has a low attack vector (local).
Potential Impact
Successful exploitation can cause the gawk program to crash due to heap corruption. There is no indication of code execution or privilege escalation. The impact is limited to denial of service via application crash.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch links or official fixes are provided, users should monitor Ubuntu security advisories for updates addressing this issue. Until a patch is available, avoid running vulnerable 32-bit gawk builds in untrusted environments.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-40469
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a58b4c668715ace43daac33
Added to database: 07/16/2026, 10:39:02 UTC
Last enriched: 07/16/2026, 13:18:59 UTC
Last updated: 07/31/2026, 19:24:46 UTC
Views: 5
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