Bug 2499658 (CVE-2026-40467)

Summary: CVE-2026-40467 gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in gawk. A Use After Free vulnerability exists in the do_getline_redir() routine within the io.c program file. This vulnerability can be triggered by an attacker, potentially leading to a system crash and causing a Denial of Service (DoS).
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2509821    
Bug Blocks:    

Description OSIDB Bzimport 2026-07-13 13:02:03 UTC
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.