Vulnerability · Published Nov 21, 2025 · Assigned by GitHub_M
CVE-2025-65947thread-amount is Vulnerable to Resource Exhaustion (Memory and Handle Leaks) on Windows and macOS
High 8.7
In plain English
A high-severity uncontrolled resource consumption in thread-amount from jzeuzs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).
Official description
thread-amount is a tool that gets the amount of threads in the current process. Prior to version 0.2.2, there are resource leaks when querying thread counts on Windows and Apple platforms. In Windows platforms, 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. In Apple platforms, 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. This issue has been patched in version 0.2.2.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| jzeuzs | thread-amount | < 0.2.2 |
Weakness: CWE-400, CWE-772 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
- https://github.com/jzeuzs/thread-amount/security/advisories/GHSA-jf9p-2fv9-2jp2 x_refsource_CONFIRM
- https://github.com/jzeuzs/thread-amount/pull/29 x_refsource_MISC
- https://github.com/jzeuzs/thread-amount/commit/28860d4a38286609cb884c13b5b7941edc2390e5 x_refsource_MISC