Bug 2559235 (CVE-2026-115383) - CVE-2026-115383 wasmtime: wasmtime: Denial of Service via improper validation of WebAssembly tag imports
Summary: CVE-2026-115383 wasmtime: wasmtime: Denial of Service via improper validation...
Keywords:
Status: NEW
Alias: CVE-2026-115383
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: 2026-10-22 19:25 UTC by OSIDB Bzimport
Modified: 2026-10-29 17:15 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-10-22 19:25:01 UTC 
Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains an improper validation vulnerability that accepts components whose core modules import WebAssembly tags with a subtype of the original type. Malicious guests can mis-type exception object payloads to corrupt the GC heap, causing Wasmtime to panic when the exceptions proposal is enabled.
Note You need to log in before you can comment on or make changes to this bug.