Vulnerability-Lookup

CVE-2026-64266 (GCVE-0-2026-64266)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:49 – Updated: 2026-07-25 08:49

Title

fuse: re-lock request before returning from fuse_ref_folio()

Summary

In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before returning from fuse_ref_folio() fuse_ref_folio() unlocks the request but does not re-lock it before returning. fuse_chan_abort() can end the request and the async end callback (eg fuse_writepage_free()) can free the args while the subsequent copy chain logic after fuse_ref_folio() accesses them, leading to use-after-free issues. Fix this by locking the request in fuse_ref_folio() before returning.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/1f9156714592356b4…
https://git.kernel.org/stable/c/5630da218a45ba80f…
https://git.kernel.org/stable/c/1ca605cfa59377f01…
https://git.kernel.org/stable/c/0e4a5a000123d8123…
https://git.kernel.org/stable/c/e6aa539720c3d8def…
https://git.kernel.org/stable/c/be353caffa8640f5e…
https://git.kernel.org/stable/c/65a1c2551f7e16085…
https://git.kernel.org/stable/c/b5befa80fdbe287a9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c3021629a0d820247ee12b6c5192a1d5380e21c6 , < 1f9156714592356b4fda57beac7eab9c2a462dd3 (git) Affected: c3021629a0d820247ee12b6c5192a1d5380e21c6 , < 5630da218a45ba80f0aba0846cbe8aa655da122b (git) Affected: c3021629a0d820247ee12b6c5192a1d5380e21c6 , < 1ca605cfa59377f0143fb35b5b01360f37d1b7c4 (git) Affected: c3021629a0d820247ee12b6c5192a1d5380e21c6 , < 0e4a5a000123d81234e27a2f8187688cf608f755 (git) Affected: c3021629a0d820247ee12b6c5192a1d5380e21c6 , < e6aa539720c3d8def69683ed0c07cf9faea4e8be (git) Affected: c3021629a0d820247ee12b6c5192a1d5380e21c6 , < be353caffa8640f5e25fb3714ce8b0cef5e410e5 (git) Affected: c3021629a0d820247ee12b6c5192a1d5380e21c6 , < 65a1c2551f7e16085acbb54aedde1feaa559ba7a (git) Affected: c3021629a0d820247ee12b6c5192a1d5380e21c6 , < b5befa80fdbe287a98480effed9564712924add5 (git)
Linux	Linux	Affected: 2.6.35 Unaffected: 0 , < 2.6.35 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: re-lock request before returning from fuse_ref_folio()\n\nfuse_ref_folio() unlocks the request but does not re-lock it before\nreturning. fuse_chan_abort() can end the request and the async end\ncallback (eg fuse_writepage_free()) can free the args while the\nsubsequent copy chain logic after fuse_ref_folio() accesses them,\nleading to use-after-free issues.\n\nFix this by locking the request in fuse_ref_folio() before returning."
        }
      ],
      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "datePublished": "2026-07-25T08:49:15.142Z",
    "dateReserved": "2026-07-19T15:36:31.775Z",
    "dateUpdated": "2026-07-25T08:49:15.142Z",
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      "date": "2026-07-26",
      "epss": "0.00211",
      "percentile": "0.11454"
    },
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    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T16:46:59Z",
      "cve": "CVE-2026-64266",
      "id": "CVE-2026-64266",
      "initial_release_date": "2026-07-25T16:46:59Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64266",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64266.json",
      "version": "2"
    }
  }
}

GHSA-X828-8HM7-W4XW

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

In the Linux kernel, the following vulnerability has been resolved:

fuse: re-lock request before returning from fuse_ref_folio()

fuse_ref_folio() unlocks the request but does not re-lock it before returning. fuse_chan_abort() can end the request and the async end callback (eg fuse_writepage_free()) can free the args while the subsequent copy chain logic after fuse_ref_folio() accesses them, leading to use-after-free issues.

Fix this by locking the request in fuse_ref_folio() before returning.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-64266"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:06Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: re-lock request before returning from fuse_ref_folio()\n\nfuse_ref_folio() unlocks the request but does not re-lock it before\nreturning. fuse_chan_abort() can end the request and the async end\ncallback (eg fuse_writepage_free()) can free the args while the\nsubsequent copy chain logic after fuse_ref_folio() accesses them,\nleading to use-after-free issues.\n\nFix this by locking the request in fuse_ref_folio() before returning.",
  "id": "GHSA-x828-8hm7-w4xw",
  "modified": "2026-07-25T12:31:28Z",
  "published": "2026-07-25T12:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64266"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e4a5a000123d81234e27a2f8187688cf608f755"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ca605cfa59377f0143fb35b5b01360f37d1b7c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f9156714592356b4fda57beac7eab9c2a462dd3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5630da218a45ba80f0aba0846cbe8aa655da122b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/65a1c2551f7e16085acbb54aedde1feaa559ba7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5befa80fdbe287a98480effed9564712924add5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be353caffa8640f5e25fb3714ce8b0cef5e410e5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6aa539720c3d8def69683ed0c07cf9faea4e8be"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-64266 (GCVE-0-2026-64266)

GHSA-X828-8HM7-W4XW

Tags

Sightings

Nomenclature