github - ghsa-jgjw-jx49-6q8j

GHSA-JGJW-JX49-6Q8J

Vulnerability from github – Published: 2025-09-23 06:30 – Updated: 2025-09-23 06:30

Details

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

fuse: Block access to folio overlimit

syz reported a slab-out-of-bounds Write in fuse_dev_do_write.

When the number of bytes to be retrieved is truncated to the upper limit by fc->max_pages and there is an offset, the oob is triggered.

Add a loop termination condition to prevent overruns.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39888"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-23T06:15:48Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: Block access to folio overlimit\n\nsyz reported a slab-out-of-bounds Write in fuse_dev_do_write.\n\nWhen the number of bytes to be retrieved is truncated to the upper limit\nby fc-\u003emax_pages and there is an offset, the oob is triggered.\n\nAdd a loop termination condition to prevent overruns.",
  "id": "GHSA-jgjw-jx49-6q8j",
  "modified": "2025-09-23T06:30:28Z",
  "published": "2025-09-23T06:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39888"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/623719227b114d73a2cee45f1b343ced63ce09ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d81ba6d49a7457784f0b6a71046818b86ec7e44"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-39888 (GCVE-0-2025-39888)

Vulnerability from cvelistv5 – Published: 2025-09-23 06:00 – Updated: 2025-09-29 06:01

Summary

In the Linux kernel, the following vulnerability has been resolved: fuse: Block access to folio overlimit syz reported a slab-out-of-bounds Write in fuse_dev_do_write. When the number of bytes to be retrieved is truncated to the upper limit by fc->max_pages and there is an offset, the oob is triggered. Add a loop termination condition to prevent overruns.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/623719227b114d73a…
	https://git.kernel.org/stable/c/9d81ba6d49a745778…

Impacted products

Vendor

Product

Version

Linux

Affected: 3568a956932621cafadafc8b75fcf6dc06555105 , < 623719227b114d73a2cee45f1b343ced63ce09ec (git)
Affected: 3568a956932621cafadafc8b75fcf6dc06555105 , < 9d81ba6d49a7457784f0b6a71046818b86ec7e44 (git)

Linux

Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.16.8 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/fuse/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "623719227b114d73a2cee45f1b343ced63ce09ec",
              "status": "affected",
              "version": "3568a956932621cafadafc8b75fcf6dc06555105",
              "versionType": "git"
            },
            {
              "lessThan": "9d81ba6d49a7457784f0b6a71046818b86ec7e44",
              "status": "affected",
              "version": "3568a956932621cafadafc8b75fcf6dc06555105",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/fuse/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.8",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: Block access to folio overlimit\n\nsyz reported a slab-out-of-bounds Write in fuse_dev_do_write.\n\nWhen the number of bytes to be retrieved is truncated to the upper limit\nby fc-\u003emax_pages and there is an offset, the oob is triggered.\n\nAdd a loop termination condition to prevent overruns."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-29T06:01:50.121Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/623719227b114d73a2cee45f1b343ced63ce09ec"
        },
        {
          "url": "https://git.kernel.org/stable/c/9d81ba6d49a7457784f0b6a71046818b86ec7e44"
        }
      ],
      "title": "fuse: Block access to folio overlimit",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39888",
    "datePublished": "2025-09-23T06:00:54.156Z",
    "dateReserved": "2025-04-16T07:20:57.145Z",
    "dateUpdated": "2025-09-29T06:01:50.121Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-JGJW-JX49-6Q8J

CVE-2025-39888 (GCVE-0-2025-39888)

Tags

Sightings

Nomenclature