{"answers":{"affected":"13 open source packages ship an affected version, including wasmtime and wasmtime-wasi. It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-53901 in the wild and no public exploit code.","fix":"Upgrade wasmtime to a fixed version for your release line: 24.0.4, 33.0.2 or 34.0.2.","what":"CVE-2025-53901 is a low-severity denial of service vulnerability in bytecodealliance wasmtime, published on 18 Jul 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2025-53901 and fix it if it is affected.\n\nWhat it is: CVE-2025-53901 is a low-severity denial of service vulnerability in bytecodealliance wasmtime, published on 18 Jul 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2025-53901 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- wasmtime (crates.io): affected from 10.0.0; fixed in 24.0.4, 33.0.2, 34.0.2\n- wasmtime (crates.io): affected from 10.0.0; fixed in 24.0.4\n- wasmtime (crates.io): affected from 10.0.0; fixed in 24.0.4\n- wasmtime (crates.io): affected from 33.0.0; fixed in 33.0.2\n- wasmtime (crates.io): affected from 33.0.0; fixed in 33.0.2\n- wasmtime (crates.io): affected from 34.0.0; fixed in 34.0.2\n- wasmtime (crates.io): affected from 34.0.0; fixed in 34.0.2\n- wasmtime-wasi (crates.io): affected all versions; fixed in 24.0.4\n- wasmtime-wasi (crates.io): affected all versions; fixed in 24.0.4\n- wasmtime-wasi (crates.io): affected from 25.0.0; fixed in 33.0.2\n- wasmtime-wasi (crates.io): affected from 25.0.0; fixed in 33.0.2\n- wasmtime-wasi (crates.io): affected from 34.0.0; fixed in 34.0.2\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-53901/ (Markdown: https://insights.sbomify.com/CVE-2025-53901/index.md)","id":"CVE-2025-53901","markdown":"https://insights.sbomify.com/CVE-2025-53901/index.md","name":"CVE-2025-53901","record":{"aliases":["DEBIAN-CVE-2025-53901","GHSA-fm79-3f68-h2fc","JLSEC-2026-1349","RUSTSEC-2025-0046","UBUNTU-CVE-2025-53901","openSUSE-SU-2025:15398-1","openSUSE-SU-2025:15704-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"WebAssembly runtime","requires_auth":"low_privilege","summary":"A crafted WebAssembly guest can panic the host runtime via WASIp1 file descriptor handling, causing denial of service for embedders.","user_interaction":"required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"wasmtime","vendor":"bytecodealliance"}],"cvss":{"score":3.5,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-672","name":"Operation on a Resource after Expiration or Release"}],"description":"Wasmtime is a runtime for WebAssembly. Prior to versions 24.0.4, 33.0.2, and 34.0.2, a bug in Wasmtime's implementation of the WASIp1 set of import functions can lead to a WebAssembly guest inducing a panic in the host (embedder). The specific bug is triggered by calling `path_open` after calling `fd_renumber` with either two equal argument values or a second argument being equal to a previously-closed file descriptor number value. The corrupt state introduced in `fd_renumber` will lead to the subsequent opening of a file descriptor to panic. This panic cannot introduce memory unsafety or allow WebAssembly to break outside of its sandbox, however. There is no possible heap corruption or memory unsafety from this panic. This bug is in the implementation of Wasmtime's `wasmtime-wasi` crate which provides an implementation of WASIp1. The bug requires a specially crafted call to `fd_renumber` in addition to the ability to open a subsequent file descriptor. Opening a second file descriptor is only possible when a preopened directory was provided to the guest, and this is common amongst embeddings. A panic in the host is considered a denial-of-service vector for WebAssembly embedders and is thus a security issue in Wasmtime. This bug does not affect WASIp2 and embedders using components. In accordance with Wasmtime's release process, patch releases are available as 24.0.4, 33.0.2, and 34.0.2. Users of other release of Wasmtime are recommended to move to a supported release of Wasmtime. Embedders who are using components or are not providing guest access to create more file descriptors (e.g. via a preopened filesystem directory) are not affected by this issue. Otherwise, there is no workaround at this time, and affected embeddings are recommended to update to a patched version which will not cause a panic in the host.","ecosystems":["crates.io","openSUSE:Tumbleweed"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Wasmtime has host panic with `fd_renumber` WASIp1 function","id":"CVE-2025-53901","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"denial_of_service","year":"2025"},"n_packages":15,"n_references":5,"next":{"headline":"Tuleap exposes artifacts to a mentioned user via email notifications","id":"CVE-2025-53902"},"packages":[{"ecosystem":"crates.io","fixed":["24.0.4","33.0.2","34.0.2"],"introduced":["10.0.0","25.0.0","34.0.0"],"last_affected":[],"package":"wasmtime","purl":"pkg:cargo/wasmtime","source":"RUSTSEC-2025-0046"},{"ecosystem":"crates.io","fixed":["24.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"wasmtime","purl":null,"source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"crates.io","fixed":["24.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"wasmtime","purl":"pkg:cargo/wasmtime","source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"crates.io","fixed":["33.0.2"],"introduced":["33.0.0"],"last_affected":[],"package":"wasmtime","purl":null,"source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"crates.io","fixed":["33.0.2"],"introduced":["33.0.0"],"last_affected":[],"package":"wasmtime","purl":"pkg:cargo/wasmtime","source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"crates.io","fixed":["34.0.2"],"introduced":["34.0.0"],"last_affected":[],"package":"wasmtime","purl":null,"source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"crates.io","fixed":["34.0.2"],"introduced":["34.0.0"],"last_affected":[],"package":"wasmtime","purl":"pkg:cargo/wasmtime","source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"crates.io","fixed":["24.0.4"],"introduced":["0"],"last_affected":[],"package":"wasmtime-wasi","purl":null,"source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"crates.io","fixed":["24.0.4"],"introduced":["0"],"last_affected":[],"package":"wasmtime-wasi","purl":"pkg:cargo/wasmtime-wasi","source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"crates.io","fixed":["33.0.2"],"introduced":["25.0.0"],"last_affected":[],"package":"wasmtime-wasi","purl":null,"source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"crates.io","fixed":["33.0.2"],"introduced":["25.0.0"],"last_affected":[],"package":"wasmtime-wasi","purl":"pkg:cargo/wasmtime-wasi","source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"crates.io","fixed":["34.0.2"],"introduced":["34.0.0"],"last_affected":[],"package":"wasmtime-wasi","purl":null,"source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"crates.io","fixed":["34.0.2"],"introduced":["34.0.0"],"last_affected":[],"package":"wasmtime-wasi","purl":"pkg:cargo/wasmtime-wasi","source":"GHSA-fm79-3f68-h2fc"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["1.27.1-1.1"],"introduced":["0"],"last_affected":[],"package":"kwctl","purl":"pkg:rpm/opensuse/kwctl\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2025:15398-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["0.43.1-2.1"],"introduced":["0"],"last_affected":[],"package":"zellij","purl":"pkg:rpm/opensuse/zellij\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2025:15704-1"}],"prev":{"headline":"Kiteworks MFT has a Privilege Defined With Unsafe Actions","id":"CVE-2025-53900"},"products":["wasmtime"],"published":"2025-07-18","related":[{"cvss_score":9,"headline":"Wasmtime miscompiled guest heap access enables sandbox escape on aarch64 Cranelift","id":"CVE-2026-34971","kev_date_added":null,"published":"2026-04-09"},{"cvss_score":9,"headline":"Wasmtime with Winch compiler backend on aarch64 may allow a sandbox-escaping memory access","id":"CVE-2026-34987","kev_date_added":null,"published":"2026-04-09"},{"cvss_score":8.6,"headline":"Wasmtime vulnerable to data leakage between instances in the pooling allocator","id":"CVE-2022-39393","kev_date_added":null,"published":"2022-11-10"},{"cvss_score":8.1,"headline":"Use after free in Wasmtime","id":"CVE-2022-24791","kev_date_added":null,"published":"2022-03-31"},{"cvss_score":7.5,"headline":"Wasmtime: WASI path_open(TRUNCATE) bypasses `FilePerms::WRITE` host restriction","id":"CVE-2026-47261","kev_date_added":null,"published":"2026-06-15"},{"cvss_score":6.9,"headline":"Wasmtime has a Heap OOB read in component model UTF-16 to latin1+utf16 string transcoding","id":"CVE-2026-34941","kev_date_added":null,"published":"2026-04-09"},{"cvss_score":6.9,"headline":"Wasmtime is vulnerable to panic when dropping a `[Typed]Func::call_async` future","id":"CVE-2026-27195","kev_date_added":null,"published":"2026-02-24"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"open","licence":"CC0 1.0","name":"RustSec","prefix":"RUSTSEC"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-07-18","vendors":["bytecodealliance"]},"summary":"A crafted WebAssembly guest can panic the host runtime via WASIp1 file descriptor handling, causing denial of service for embedders.","url":"https://insights.sbomify.com/CVE-2025-53901/"}