CVE-2025-65947
thread-amount Vulnerable to Resource Exhaustion (Memory and Handle Leaks) on Windows and macOS
Impact
Affected versions of this crate contain resource leaks when querying thread counts on Windows and Apple platforms. ### Windows The `thread_amount` function calls `CreateToolhelp32Snapshot` but fails to close the returned `HANDLE` using `CloseHandle`. Repeated calls to this function will cause the handle count of the process to grow indefinitely, eventually leading to system instability or process termination when the handle limit is reached. ### macOS / iOS The `thread_amount` function calls `task_threads` (via Mach kernel APIs) which allocates memory for the thread list. The function fails to deallocate this memory using `vm_deallocate`. Repeated calls will result in a steady memory leak, eventually causing the process to be killed by the OOM (Out of Memory) killer. ### Impact Long-running applications (such as servers, daemons, or monitoring tools) that use this crate to periodically check thread counts will eventually crash due to resource exhaustion. ### Resources - https://github.com/jzeuzs/thread-amount/pull/29
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | thread-amount | < 0.2.2 | 0.2.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/jzeuzs/thread-amount/commit/28860d4a38286609cb884c13b5b7941edc2390e5
- https://github.com/jzeuzs/thread-amount/pull/29
- https://github.com/jzeuzs/thread-amount/security/advisories/GHSA-jf9p-2fv9-2jp2
- https://github.com/advisories/GHSA-jf9p-2fv9-2jp2
- https://nvd.nist.gov/vuln/detail/CVE-2025-65947
- https://rustsec.org/advisories/RUSTSEC-2025-0125.html