{"id":"CVE-2026-115386","aliases":["RUSTSEC-2026-0323","GHSA-96f6-r43r-8c24"],"title":"fd_readdir copies uninitialized struct padding into guest memory","summary":"fd_readdir copies uninitialized struct padding into guest memory","severity":"low","cvss":2.6,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N","vendor":"wasmtime-wasi","product":"wasmtime-wasi","ecosystem":"rust","affected":["wasmtime-wasi >= 49.0.0, < 49.0.2"],"patched":["wasmtime-wasi 49.0.2"],"published":"2026-10-02","updated":"2026-10-24","sourceUpdated":"2026-10-24T06:25:41Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2026-0323","references":[{"url":"https://crates.io/crates/wasmtime-wasi"},{"url":"https://rustsec.org/advisories/RUSTSEC-2026-0323.html"},{"url":"https://github.com/bytecodealliance/wasmtime/pull/14487"},{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-96f6-r43r-8c24","label":"GitHub Security Advisory (GHSA-96f6-r43r-8c24)"},{"url":"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","label":"VulnCheck Advisory: 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"}],"tags":["osv","rust","cve.org"],"epss":0.00197,"epssPercentile":0.09398,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-23T14:48:30.373491Z"},"cvssSource":"cna","cwe":["CWE-908"],"ingestedAt":"2026-10-22T22:00:50.405Z","slug":"CVE-2026-115386","body":"## Overview\n\nThis is an entry in the RustSec database for the Wasmtime security advisory\nlocated at\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-96f6-r43r-8c24\nFor more information see the GitHub-hosted security advisory.\n\n## Affected packages\n\n- `wasmtime-wasi >= 49.0.0, < 49.0.2`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `wasmtime-wasi 49.0.2`","depth":"sunlit","depthScore":14,"depthScoreParts":{"impact":14.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}