fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.18.50, 7.2.3
- CVEs
- CVE-2026-80857
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 20:53 UTC · Revision 1
Source evidence
fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
core-osv · Original sourcePublished 4 Sept 2026, 15:55 UTC
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.
osv:CVE-2026-80857
Kernel
Fixed versions: 6.18.50, 7.2.3
Complete source record
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"url": "https://osv.dev/vulnerability/CVE-2026-80857",
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"title": "fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free",
"summary": "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.",
"evidence": "osv:CVE-2026-80857",
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"modified": "2026-10-28T02:30:51.490489651Z",
"provider": "osv",
"references": [
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"provider_metadata": {
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"evidence": "/id"
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"security_relevant": true,
"severity_evidence": null
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"source_id": "core-osv",
"document_id": 520375,
"published_at": "2026-09-04T15:55:10.641+00:00"
}