What happened
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.
Affected versions
Linux: 0c7fca880a40a209a9c92be14143996d14b93ff6 through before a8bbb2a60513bf322170903c21462f0bf4f62be2 (git); 204aa22a686bfee48daca7db620c1e017615f2ff through before 715cb86e33cda43f5224cdc3fd5610c0b6a46f7a (git); 204aa22a686bfee48daca7db620c1e017615f2ff through before 64b0b5cacbd2fea88001464cb712c9dfc795b26e (git); 300e812b882a174dca675d8028684001ad5826bc (git); 6.18.25 through before 6.18.50 (semver); 7.0.2 through before 7.1 (semver); 7.1 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.