Bug 2563536 (CVE-2026-119139) - CVE-2026-119139 wasmtime: wasmtime: Denial of Service via unhandled assertion in component function call
Summary: CVE-2026-119139 wasmtime: wasmtime: Denial of Service via unhandled assertion...
Keywords:
Status: NEW
Alias: CVE-2026-119139
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-29 17:35 UTC by OSIDB Bzimport
Modified: 2026-10-29 17:41 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-10-29 17:35:08 UTC 
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a leftover assertion in component::Func::call that rejects guest exports using the async ABI option. An attacker who supplies a component with an async-lifted export can crash the host process when an embedder invokes that export through Func::call.
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