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  4. CVE 2025 64345 unsound api access to a webassembly shared linear
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Back to active CVEs
Low · CVSS 1.8CVE-2025-64345GHSA-HC7M-R6V8-HG9Q

Unsound API access to a WebAssembly shared linear memoryCVE-2025-64345

Answer in brief

CVE-2025-64345 records a Low severity (CVSS 1.8) vulnerability in Unsound API access to a WebAssembly shared linear memory. The current sources do not mark it as known exploited. The current feed maps wasmtime (crates.io). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 11, 2025Updated Oct 12, 2026Source checked Oct 12, 2026First seen by HOL Oct 12, 2026Material review Oct 12, 2026
Upstream Advisory

Key facts

Risk
Low · CVSS 1.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 1.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps wasmtime (crates.io). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
wasmtimecrates.io>=0.0.0-0 <24.0.5 >=25.0.0 <36.0.3 >=37.0.0 <37.0.3 >=38.0.0 <38.0.424.0.5, 36.0.3, 37.0.3, 38.0.4

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for wasmtime.
  2. 2Review the reported fix. Update wasmtime to 24.0.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 11, 2025

    Evidence: source:osv:source_dates:source-dates:record

  2. Source modified

    Oct 12, 2026

    Evidence: source:osv:source_dates:source-dates:record

  3. First seen by HOL

    Oct 12, 2026

Sources and claim methodology

  • Source referencecrates.io
  • GitHub security advisorygithub.com
  • Source referencerustsec.org
Upstream source description

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hc7m-r6v8-hg9q For more information see the GitHub-hosted security advisory.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
OSV
Source checked
Oct 12, 2026
References
3 linked sources
Open source record