Bug 2563554 (CVE-2026-119138)

Summary: CVE-2026-119138 wasmtime: wasmtime: Denial of Service via assertion failure after runtime trap
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: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Wasmtime. This vulnerability allows an attacker providing misbehaving guest code to cause a Denial of Service (DoS). By inducing an execution trap that leaves the internal runtime storage in an inconsistent state, pending calls trigger an assertion failure. This failure causes the host application embedding the runtime to crash.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-10-29 17:40:37 UTC
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows pending calls to trigger an assertion failure after a trap poisons the Store. Attackers supplying misbehaving guest code can cause a trap and let earlier calls proceed, crashing embedders that continue using the inconsistent Store.