Bug 2558507 (CVE-2026-112381)

Summary: CVE-2026-112381 trafficserver: trafficserver: Denial of Service via race condition during request teardown
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Apache Traffic Server. A race condition can allow an unauthenticated remote attacker to cause a Denial of Service (DoS) by crashing the server. This vulnerability occurs when a client terminates a POST request connection while the server is processing a chunked origin response, triggering a null pointer dereference.
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Bug Depends On: 2562357, 2562358    
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Description OSIDB Bzimport 2026-10-21 19:33:44 UTC 
Apache Traffic Server can crash with a null pointer dereference when a client POST request is torn down via half-close while a chunked origin response is being reparsed from a reentrant write-ready callback, a timing-dependent race introduced by the CVE-2021-32564 flow-control backports.



This issue affects Apache Traffic Server: 9.2.15, 10.1.4, 10.2.0.



Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.