fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
Summary
| CVE | CVE-2026-80857 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-04 16:18:14 UTC |
| Updated | 2026-09-07 16:17:30 UTC |
| 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. |
Risk And Classification
EPSS: 0.001450000 probability, percentile 0.040720000 (date 2026-09-07)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 0c7fca880a40a209a9c92be14143996d14b93ff6 a8bbb2a60513bf322170903c21462f0bf4f62be2 git | Not specified |
| CNA | Linux | Linux | affected 204aa22a686bfee48daca7db620c1e017615f2ff 715cb86e33cda43f5224cdc3fd5610c0b6a46f7a git | Not specified |
| CNA | Linux | Linux | affected 204aa22a686bfee48daca7db620c1e017615f2ff 64b0b5cacbd2fea88001464cb712c9dfc795b26e git | Not specified |
| CNA | Linux | Linux | affected 300e812b882a174dca675d8028684001ad5826bc git | Not specified |
| CNA | Linux | Linux | affected 6.18.25 6.18.50 semver | Not specified |
| CNA | Linux | Linux | affected 7.0.2 7.1 semver | Not specified |
| CNA | Linux | Linux | affected 7.1 | Not specified |
| CNA | Linux | Linux | unaffected 7.1 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.50 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.3 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/64b0b5cacbd2fea88001464cb712c9dfc795b26e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a8bbb2a60513bf322170903c21462f0bf4f62be2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/715cb86e33cda43f5224cdc3fd5610c0b6a46f7a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.