Vulnerability-Lookup

GHSA-3R92-FQ36-P33J

Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-07 18:31

Details

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.

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{
  "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": []
}

CVE-2026-80857 (GCVE-0-2026-80857)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:55 – Updated: 2026-09-07 15:45

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.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/a8bbb2a60513bf322…
https://git.kernel.org/stable/c/715cb86e33cda43f5…
https://git.kernel.org/stable/c/64b0b5cacbd2fea88…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0c7fca880a40a209a9c92be14143996d14b93ff6 , < a8bbb2a60513bf322170903c21462f0bf4f62be2 (git) Affected: 204aa22a686bfee48daca7db620c1e017615f2ff , < 715cb86e33cda43f5224cdc3fd5610c0b6a46f7a (git) Affected: 204aa22a686bfee48daca7db620c1e017615f2ff , < 64b0b5cacbd2fea88001464cb712c9dfc795b26e (git) Affected: 300e812b882a174dca675d8028684001ad5826bc (git) Affected: 6.18.25 , < 6.18.50 (semver) Affected: 7.0.2 , < 7.1 (semver)
Linux	Linux	Affected: 7.1 Unaffected: 0 , < 7.1 (semver) Unaffected: 6.18.50 , ≤ 6.18.* (semver) Unaffected: 7.2.3 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/fuse/dev.c"
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          "vendor": "Linux",
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              "status": "affected",
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              "versionType": "git"
            },
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              "version": "204aa22a686bfee48daca7db620c1e017615f2ff",
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            }
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                  "versionStartIncluding": "6.18.25",
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      "providerMetadata": {
        "dateUpdated": "2026-09-07T15:45:14.159Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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GHSA-3R92-FQ36-P33J

CVE-2026-80857 (GCVE-0-2026-80857)

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