CVE-2026-80860

/// Technical 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()

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References