fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free (CVE-2026-80857) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80857

fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free

Answer in brief

CVE-2026-80857 records a Unknown severity vulnerability in fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 4, 2026Updated Sep 4, 2026Source checked Sep 4, 2026First seen by HOL Sep 4, 2026Material review Sep 4, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=204aa22a686bfee48daca7db620c1e017615f2ff <715cb86e33cda43f5224cdc3fd5610c0b6a46f7a \|\| >=204aa22a686bfee48daca7db620c1e017615f2ff <64b0b5cacbd2fea88001464cb712c9dfc795b26e \|\| 0c7fca880a40a209a9c92be14143996d14b93ff6 \|\| 300e812b882a174dca675d8028684001ad5826bc \|\| >=6.18.25 <6.19 \|\| >=7.0.2 <7.1	715cb86e33cda43f5224cdc3fd5610c0b6a46f7a, 64b0b5cacbd2fea88001464cb712c9dfc795b26e, 6.19, 7.1
Linux/Linuxgeneric	7.1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 715cb86e33cda43f5224cdc3fd5610c0b6a46f7a if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 4, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.