Out-of-bounds Write Affecting rust-wasmtime package, versions <36.0.13+dfsg-1


Severity

Recommended
0.0
low
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.09% (1st percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-RUSTWASMTIME-21664632
  • published24 Oct 2026
  • disclosed22 Oct 2026

Introduced: 22 Oct 2026

NewCVE-2026-115393  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Debian:unstable rust-wasmtime to version 36.0.13+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rust-wasmtime package and not the rust-wasmtime package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 contains a type confusion vulnerability because several Store APIs fail to validate that objects belong to the Store's Engine. Embedders mixing objects between Engines via Instance::new, StructRefPre::new, or Tag::new can trigger trampoline signature mismatches causing out-of-bounds stack writes, GC heap corruption, or panics.

CVSS Base Scores

version 3.1