Bug 2558445

Summary: CVE-2026-114459 mod_qos: Out-of-bounds reads in response-body substring matching [fedora-all]
Product: [Fedora] Fedora Reporter: Vladimir Vasilev <vvasilev>
Component: mod_qosAssignee: Neil Hanlon <neil>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: low Docs Contact:
Priority: low    
Version: rawhideCC: christof, neil
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["79e3ce08-bdb9-457b-91aa-55bb21fae778"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2558397    

Description Vladimir Vasilev 2026-10-21 18:25:44 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A flaw was found in mod_qos. When QS_SetEnvIfResBody is enabled, qos_strnstr() searches response buckets that need not be NUL-terminated. Its outer scan and exit checks, as well as its inner match loop, dereference input bytes before checking that they are within the supplied length, allowing reads beyond a response bucket. An unauthenticated remote client who triggers a response with suitable bucket contents and memory layout may cause an Apache worker process to crash, resulting in denial of service.