CVE-2026-80857 (GCVE-0-2026-80857)
Vulnerability from cvelistv5
Published
2026-09-04 15:55
Modified
2026-10-19 08:44
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0c7fca880a40a209a9c92be14143996d14b93ff6
Version: 204aa22a686bfee48daca7db620c1e017615f2ff
Version: 204aa22a686bfee48daca7db620c1e017615f2ff
Version: 300e812b882a174dca675d8028684001ad5826bc
Version: 6.18.25   ≤
Version: 7.0.2   ≤
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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:44:51.239Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      ],
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    "cveId": "CVE-2026-80857",
    "datePublished": "2026-09-04T15:55:10.641Z",
    "dateReserved": "2026-08-26T14:34:25.797Z",
    "dateUpdated": "2026-10-19T08:44:51.239Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}


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