# CVE-2026-99217: linux: In the Linux kernel, the following vulnerability has been resolved:  fork: release the files of a failed fork after s...

CVE-2026-99217 is fixed in linux on 1 platform by DEBIAN-CVE-2026-99217 (version 6.12.115-1), released November 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-99217
- Priority: Routine
- CVSS: n/a
- EPSS: n/a
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 2, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  fork: release the files of a failed fork after sched_cancel_fork()  Reorder copy_process() cleanup so sched_fork() taking scx_fork_rwsem scx_pre_fork() is safe and isn't held around exiting files. Right now, a fork that fails while another thread closed the bpf link fd will deadlock against its own read side. It also blocks every fork on the system:      copy_process()                  holds scx_fork_rwsem for read       exit_files()         close_files()           filp_close_sync()             bpf_scx_unreg()               kthread_flush_work()  waits for the disable work                 scx_root_disable()                   percpu_down_write(&scx_fork_rwsem)  Simply release the child's files after sched_cancel_fork() dropped the lock. The task starts out as a copy of its parent so p->files points to the parent's table until copy_files() replaces it. exit_files() must not run for a fork that failed before that. Clear p->files up front so exit_files() is a no-op for those and make copy_files() set it explicitly for CLONE_FILES.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.115-1 | [DEBIAN-CVE-2026-99217](https://patchblox.com/security/data/fix/linux/debian-cve-2026-99217.md) | Nov 3, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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