# CVE-2025-39976: linux: In the Linux kernel, the following vulnerability has been resolved:  futex: Use correct exit on failure from futex_ha...

CVE-2025-39976 is fixed in linux on 1 platform by DEBIAN-CVE-2025-39976 (version 6.16.10-1), released October 15, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-39976
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 15, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  futex: Use correct exit on failure from futex_hash_allocate_default()  copy_process() uses the wrong error exit path from futex_hash_allocate_default(). After exiting from futex_hash_allocate_default(), neither tasklist_lock nor siglock has been acquired. The exit label bad_fork_core_free unlocks both of these locks which is wrong.  The next exit label, bad_fork_cancel_cgroup, is the correct exit. sched_cgroup_fork() did not allocate any resources that need to freed.  Use bad_fork_cancel_cgroup on error exit from futex_hash_allocate_default().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.16.10-1 | [DEBIAN-CVE-2025-39976](https://patchblox.com/security/data/fix/linux/debian-cve-2025-39976.md) | Oct 15, 2025 |

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