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{"bugzilla": {"description": "wasmtime: wasmtime: Memory corruption via preemption checks during bulk operations", "id": "2545305", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2545305"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1265", "details": ["A flaw was found in wasmtime. Execution preemption checks during bulk operations can expose an invalid intermediate state if an application mutates or continues using the execution store after a cancellation or trap. Under these conditions, an attacker executing WebAssembly code can cause memory corruption, invalid memory access, or an application crash resulting in a Denial of Service (DoS)."], "name": "CVE-2026-104855", "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"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "openshell", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "rust", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-10-02T17:37:50Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-104855\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-104855\nhttps://github.com/bytecodealliance/wasmtime/commit/3ebfbe5af4927c157d6fcaca42b8dbb6d17b73fb\nhttps://github.com/bytecodealliance/wasmtime/commit/99b0bc39d447317a4102c056081c83a9a84a46e0\nhttps://github.com/bytecodealliance/wasmtime/commit/a3eb27af01ba5a30320a90ea1405059cdfedd353\nhttps://github.com/bytecodealliance/wasmtime/pull/14041\nhttps://github.com/bytecodealliance/wasmtime/pull/14043\nhttps://github.com/bytecodealliance/wasmtime/pull/14045\nhttps://github.com/bytecodealliance/wasmtime/releases/tag/v46.0.2\nhttps://github.com/bytecodealliance/wasmtime/releases/tag/v47.0.3\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-2hw9-mc66-jc2q"], "threat_severity": "Moderate"}