3.1

CVE-2025-62711: bytecodealliance wasmtime

CVSS: 3.1v3.1LowAnalyzed
AliasesUBUNTU-CVE-2025-62711GHSA-4h67-722j-5pmcRUSTSEC-2025-0112
Published 24-10-2025Last modified 27-10-2025
Open JSON

Vulnerability summary

CVE-2025-62711 is a low (CVSS 3.1) vulnerability in bytecodealliance wasmtime. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 35.7% of scored vulnerabilities.

Overall risk
12/100
0100
Low · default modelHow is this calculated?
CVSS score
3.1/10
010
Low · v3.1 (NVD)
EPSS score
0.43%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-10-2025
    PublishedVulnerability first disclosed.
  2. 27-10-2025
    Last modifiedVulnerability information updated.

Description

Wasmtime is a runtime for WebAssembly. In versions from 38.0.0 to before 38.0.3, the implementation of component-model related host-to-wasm trampolines in Wasmtime contained a bug where it's possible to carefully craft a component, which when called in a specific way, would crash the host with a segfault or assert failure. Wasmtime 38.0.3 has been released and is patched to fix this issue. There are no workarounds.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

+0.03 pp

From 0.40% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.43%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Bytecodealliance1 product
Crates.Io1 product
  • wasmtime≥ 38.0.0, < 38.0.3
Ubuntu1 product
  • rust-wasmtimeAll versions (No fix recorded)

3 vendors · 3 products

References

9 links