CVE-2026-115386

EUVD-2026-108314
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
2.6 LOW
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 3.84%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
bytecodealliancewasmtime
𝑥
< 36.0.17
CNA
bytecodealliancewasmtime
37.0.0 ≤
𝑥
< 48.0.4
CNA
bytecodealliancewasmtime
49.0.0 ≤
𝑥
< 49.0.2
CNA
Debian logo
Debian Releases
Debian Product
Codename
rust-wasmtime
forky
vulnerable
sid
vulnerable
trixie
vulnerable
Common Weakness Enumeration
References
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-96f6-r43r-8c24
https://www.vulncheck.com/advisories/wasmtime-before-36.0.17-37.0.0-before-48.0.4-and-49.0.0-before-49.0.2-memory-disclosure-via-fd-readdir