GHSA-3R92-FQ36-P33J
Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-07 18:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-80857"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-04T16:18:14Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free\n\nThe abort_on_kill path in request_wait_answer() calls fuse_abort_conn()\nand returns without waiting for FR_FINISHED. If fuse_dev_do_write() is\nconcurrently processing the same request (FR_LOCKED set), the caller\nfrees req-\u003eargs while it is still being accessed, causing a\nuse-after-free.\n\nFix this by jumping to the existing wait_event(FR_FINISHED) instead of\nreturning early. The wait will not hang because fuse_abort_conn()\nensures all requests are ended.",
"id": "GHSA-3r92-fq36-p33j",
"modified": "2026-09-07T18:31:31Z",
"published": "2026-09-04T18:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80857"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/64b0b5cacbd2fea88001464cb712c9dfc795b26e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/715cb86e33cda43f5224cdc3fd5610c0b6a46f7a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a8bbb2a60513bf322170903c21462f0bf4f62be2"
}
],
"schema_version": "1.4.0",
"severity": []
}
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