Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() 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.
AI Analysis
Technical Summary
The vulnerability is a Use After Free issue located in the do_getline_redir() function within the io.c source file of gawk. This flaw can lead to a program crash when exploited. The affected versions include gawk 5.4.0 and earlier, specifically multiple Ubuntu package versions listed. There is no indication of privilege requirements or user interaction needed for the vulnerability to manifest. No known exploits are reported in the wild. The CVSS vector indicates a low complexity local attack with no privileges or user interaction required, but the impact is limited to a crash.
Potential Impact
The primary impact is a potential crash of the gawk process due to the Use After Free vulnerability. There is no evidence from the provided data that this vulnerability leads to code execution, privilege escalation, or data disclosure. The impact is therefore limited to denial of service conditions affecting the affected gawk versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor Ubuntu security advisories for updates addressing this vulnerability and apply patches once available.
Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine).
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.
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 a Use After Free issue located in the do_getline_redir() function within the io.c source file of gawk. This flaw can lead to a program crash when exploited. The affected versions include gawk 5.4.0 and earlier, specifically multiple Ubuntu package versions listed. There is no indication of privilege requirements or user interaction needed for the vulnerability to manifest. No known exploits are reported in the wild. The CVSS vector indicates a low complexity local attack with no privileges or user interaction required, but the impact is limited to a crash.
Potential Impact
The primary impact is a potential crash of the gawk process due to the Use After Free vulnerability. There is no evidence from the provided data that this vulnerability leads to code execution, privilege escalation, or data disclosure. The impact is therefore limited to denial of service conditions affecting the affected gawk versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor Ubuntu security advisories for updates addressing this vulnerability and apply patches once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-40467
- 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: 6a58b4c668715ace43daac3b
Added to database: 07/16/2026, 10:39:02 UTC
Last enriched: 07/16/2026, 13:19:25 UTC
Last updated: 07/31/2026, 19:24:46 UTC
Views: 3
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