Bug 2560222 (CVE-2026-115893) - CVE-2026-115893 wasmtime: Wasmtime: Cranelift backend on aarch64 can jump to incorrect target on large Wasm `br_table` instruction
Summary: CVE-2026-115893 wasmtime: Wasmtime: Cranelift backend on aarch64 can jump to ...
Keywords:
Status: NEW
Alias: CVE-2026-115893
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2562009 2562010
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-23 21:41 UTC by OSIDB Bzimport
Modified: 2026-10-27 14:29 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-10-23 21:41:27 UTC 
Wasmtime is a runtime for WebAssembly. Prior to 36.0.19, 48.0.7, and 49.0.4, the Cranelift compiler backend on aarch64 can compile a Wasm br_table instruction with more than approximately 256,000 targets so that it has an incorrect conditional branch target. The branch can then jump to arbitrary other code at a user-controlled offset, allowing a user-controlled Wasm module to escape the sandbox on aarch64 engines using the default Cranelift backend. This issue is fixed in versions 36.0.19, 48.0.7, and 49.0.4.
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