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{"bugzilla": {"description": "wasmtime: wasmtime: Denial of Service via improper validation of WebAssembly tag imports", "id": "2559235", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559235"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-843", "details": ["A flaw was found in Wasmtime. This vulnerability allows an untrusted guest module to cause a Denial of Service (DoS) by triggering a host application crash. When the WebAssembly exceptions feature is enabled, Wasmtime improperly validates imported tags that use subtypes of expected types. A malicious guest can exploit this behavior to mis-type exception payloads and corrupt internal memory, causing the runtime to terminate abruptly."], "name": "CVE-2026-115383", "package_state": [{"cpe": "cpe:/a:redhat:connectivity_link:1", "fix_state": "Fix deferred", "package_name": "rhcl-1/wasm-shim-rhel9", "product_name": "Red Hat Connectivity Link 1"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "tree-sitter", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "virt-firmware-rs", "product_name": "Red Hat Enterprise Linux 10"}], "public_date": "2026-10-22T19:13:50Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-115383\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-115383\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-cfhf-m2cr-62wj\nhttps://www.vulncheck.com/advisories/wasmtime-47.0.0-before-48.0.4-and-49.0.0-before-49.0.2-gc-heap-corruption-via-tag-imports"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[47.0.0,48.0.4)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "48.0.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[49.0.0,49.0.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "49.0.2"}}], "enrichment": {"confidence": 100.0, "confidence_source": "inferred", "scores": [{"score": 100.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "wasmtime", "source": "cna", "vendor": "bytecodealliance"}, "product": "wasmtime", "vendor": "bytecodealliance"}], "created": "2026-10-23T03:30:15.962662+00:00", "updated": "2026-10-23T07:15:17.035750+00:00", "vendors": ["bytecodealliance", "bytecodealliance$PRODUCT$wasmtime"]}