Bug 2563562 (CVE-2026-119133)
| Summary: | CVE-2026-119133 wasmtime: wasmtime: Undefined behavior via misaligned VMContext layout | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | unspecified | CC: | rhel-process-autobot, watson-tool-maintainers |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in Wasmtime. An attacker capable of supplying an untrusted WebAssembly (Wasm) module can cause undefined behavior in the host application. When processing a module containing an odd number of exception tags while exception handling is enabled, Wasmtime improperly aligns host fields within its internal virtual machine context (VMContext) structure. This memory misalignment can lead to unpredictable application execution or compromised host integrity.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
OSIDB Bzimport
2026-10-29 17:42:29 UTC
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