Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free The abort_on_kill path in request_wait_answer() calls fuse_abort_conn() and returns without waiting for FR_FINISHED. If fuse_dev_do_write() is concurrently processing the same request (FR_LOCKED set), the caller frees req->args while it is still being accessed, causing a use-after-free. Fix this by jumping to the existing wait_event(FR_FINISHED) instead of returning early. The wait will not hang because fuse_abort_conn() ensures all requests are ended.
References
- https://git.kernel.org/stable/c/64b0b5cacbd2fea88001464cb712c9dfc795b26e
- https://git.kernel.org/stable/c/715cb86e33cda43f5224cdc3fd5610c0b6a46f7a
- https://git.kernel.org/stable/c/a8bbb2a60513bf322170903c21462f0bf4f62be2
FAQ
What is CVE-2026-80857?
CVE-2026-80857 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free The abort_on_kill path in request_wait_answer() calls fuse_a...
How severe is CVE-2026-80857?
CVSS scoring is not yet available for CVE-2026-80857. Check NVD for updates.
Is there a patch for CVE-2026-80857?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.