CVEvulnerability
CVE-2026-80860
- Status
- Received
- Published
- 2026-09-04
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
fuse: fix race between interrupt and resend
After commit f8fce75fedf7 ("fuse: clear intr_entry in fuse_resend and
fuse_remove_pending_req") the WARN_ON(!list_empty(&req->intr_entry)) in
fuse_request_free() still triggers due to the following race:
In request_wait_answer()
if (test_bit(FR_SENT, &req->flags)) -> returns true
In fuse_chan_resend()
clear_bit(FR_SENT, &req->flags)
In request_wait_answer()
queue_interrupt(req)
Fix by:
- move clearing FR_SENT inside fpq->lock
- move setting FR_PENDING inside fiq->lock
- recheck FR_SENT after acquiring fiq->lock in fuse_dev_queue_interrupt()
References
- https://git.kernel.org/stable/c/0f930904452945f409eeeb0c9afa08bf27185cb1 git.kernel.org
- https://git.kernel.org/stable/c/26fbe4bc3ef3ab0200407681cbef182af5d151de git.kernel.org
- https://git.kernel.org/stable/c/67ddf061790e833d7e34f9dc901866c9fb25d72d git.kernel.org
- https://git.kernel.org/stable/c/ed9c881f3b498383f73c42712b359419da42a7b0 git.kernel.org