Use of Uninitialized Resource Affecting rust-wasmtime package, versions *


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.15% (4th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-RUSTWASMTIME-21664620
  • published24 Oct 2026
  • disclosed22 Oct 2026

Introduced: 22 Oct 2026

NewCVE-2026-115386  (opens in a new tab)
CWE-908  (opens in a new tab)

How to fix?

There is no fixed version for Debian:unstable rust-wasmtime.

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 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains an information disclosure vulnerability in the WASIp1 fd_readdir implementation that copies uninitialized struct padding into guest memory. Guests with a preopened directory can list entries to receive three bytes of leftover host stack or heap memory per directory entry.

CVSS Base Scores

version 3.1