Bug 2569554 (CVE-2026-124996)

Summary: CVE-2026-124996 exllamav3: exllamav3: Information disclosure via out-of-bounds read in routing kernel
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in exllamav3. A remote attacker could exploit this vulnerability by providing manipulated input to the hash-MoE (Mixture of Experts) routing kernel, triggering an out-of-bounds memory read. This flaw may allow an attacker to access unauthorized memory data, resulting in information disclosure or a Denial of Service (DoS) caused by an application crash.
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Description OSIDB Bzimport 2026-11-10 13:03:09 UTC
A weakness has been identified in Turboderp-org ExLlamaV3 up to 1.6.3. The impacted element is the function routing_sel_norm_kernel of the file exllamav3/exllamav3_ext/routing.cu of the component hash-MoE routing. This manipulation of the argument gate.tid2eid causes out-of-bounds read. Remote exploitation of the attack is possible. Upgrading to version 1.6.4 is sufficient to resolve this issue. Patch name: c9a57ae832a3035e264e0a412e1daf4ebb699b98. Upgrading the affected component is recommended.