Bug 2544828 (CVE-2026-42528)

Summary: CVE-2026-42528 httpd: httpd: Denial of Service via mod_dav shared lock memory calculation error
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: csutherl, jclere, pjindal, plodge, rhel-process-autobot, szappis, vchlup, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the mod_dav module of the Apache HTTP Server. This vulnerability allows a Denial of Service (DoS) by crashing server child processes. An attacker with permission to create Web Distributed Authoring and Versioning (WebDAV) locks can trigger a memory calculation error during lock operations, terminating active server processes.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2545027    
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Description OSIDB Bzimport 2026-10-01 23:06:46 UTC
A memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes.

Users are recommended to upgrade to version 2.4.69, which fixes this issue