github - ghsa-xqq2-8462-xjg2

GHSA-XQQ2-8462-XJG2

Vulnerability from github – Published: 2025-12-08 03:31 – Updated: 2025-12-08 03:31

Details

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

usb: gadget: f_fs: Fix epfile null pointer access after ep enable.

A race condition occurs when ffs_func_eps_enable() runs concurrently with ffs_data_reset(). The ffs_data_clear() called in ffs_data_reset() sets ffs->epfiles to NULL before resetting ffs->eps_count to 0, leading to a NULL pointer dereference when accessing epfile->ep in ffs_func_eps_enable() after successful usb_ep_enable().

The ffs->epfiles pointer is set to NULL in both ffs_data_clear() and ffs_data_close() functions, and its modification is protected by the spinlock ffs->eps_lock. And the whole ffs_func_eps_enable() function is also protected by ffs->eps_lock.

Thus, add NULL pointer handling for ffs->epfiles in the ffs_func_eps_enable() function to fix issues

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40315"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-08T01:16:04Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_fs: Fix epfile null pointer access after ep enable.\n\nA race condition occurs when ffs_func_eps_enable() runs concurrently\nwith ffs_data_reset(). The ffs_data_clear() called in ffs_data_reset()\nsets ffs-\u003eepfiles to NULL before resetting ffs-\u003eeps_count to 0, leading\nto a NULL pointer dereference when accessing epfile-\u003eep in\nffs_func_eps_enable() after successful usb_ep_enable().\n\nThe ffs-\u003eepfiles pointer is set to NULL in both ffs_data_clear() and\nffs_data_close() functions, and its modification is protected by the\nspinlock ffs-\u003eeps_lock. And the whole ffs_func_eps_enable() function\nis also protected by ffs-\u003eeps_lock.\n\nThus, add NULL pointer handling for ffs-\u003eepfiles in the\nffs_func_eps_enable() function to fix issues",
  "id": "GHSA-xqq2-8462-xjg2",
  "modified": "2025-12-08T03:31:01Z",
  "published": "2025-12-08T03:31:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40315"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c0dbd240be3f87cac321b14e17979b7e9cb6a8f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/30880e9df27332403dd638a82c27921134b3630b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ec40fba7357df2d36f4c2e2f3b9b1a4fba0a272"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b00d2572c16e8e59e979960d3383c2ae9cebd195"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c53e90563bc148e4e0ad09fe130ba2246d426ea6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cfd6f1a7b42f62523c96d9703ef32b0dbc495ba4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d62b808d5c68a931ad0849a00a5e3be3dd7e0019"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc1141a530dfc91f0ee19b7f422a2d24829584bc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-40315 (GCVE-0-2025-40315)

Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2025-12-08 00:46

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Fix epfile null pointer access after ep enable. A race condition occurs when ffs_func_eps_enable() runs concurrently with ffs_data_reset(). The ffs_data_clear() called in ffs_data_reset() sets ffs->epfiles to NULL before resetting ffs->eps_count to 0, leading to a NULL pointer dereference when accessing epfile->ep in ffs_func_eps_enable() after successful usb_ep_enable(). The ffs->epfiles pointer is set to NULL in both ffs_data_clear() and ffs_data_close() functions, and its modification is protected by the spinlock ffs->eps_lock. And the whole ffs_func_eps_enable() function is also protected by ffs->eps_lock. Thus, add NULL pointer handling for ffs->epfiles in the ffs_func_eps_enable() function to fix issues

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/b00d2572c16e8e59e…
	https://git.kernel.org/stable/c/1c0dbd240be3f87ca…
	https://git.kernel.org/stable/c/9ec40fba7357df2d3…
	https://git.kernel.org/stable/c/c53e90563bc148e4e…
	https://git.kernel.org/stable/c/fc1141a530dfc91f0…
	https://git.kernel.org/stable/c/d62b808d5c68a931a…
	https://git.kernel.org/stable/c/30880e9df27332403…
	https://git.kernel.org/stable/c/cfd6f1a7b42f62523…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b00d2572c16e8e59e979960d3383c2ae9cebd195 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1c0dbd240be3f87cac321b14e17979b7e9cb6a8f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9ec40fba7357df2d36f4c2e2f3b9b1a4fba0a272 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c53e90563bc148e4e0ad09fe130ba2246d426ea6 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fc1141a530dfc91f0ee19b7f422a2d24829584bc (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d62b808d5c68a931ad0849a00a5e3be3dd7e0019 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 30880e9df27332403dd638a82c27921134b3630b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cfd6f1a7b42f62523c96d9703ef32b0dbc495ba4 (git)

Linux

Unaffected: 5.4.302 , ≤ 5.4.* (semver)
Unaffected: 5.10.247 , ≤ 5.10.* (semver)
Unaffected: 5.15.197 , ≤ 5.15.* (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.117 , ≤ 6.6.* (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_fs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b00d2572c16e8e59e979960d3383c2ae9cebd195",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "1c0dbd240be3f87cac321b14e17979b7e9cb6a8f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "9ec40fba7357df2d36f4c2e2f3b9b1a4fba0a272",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "c53e90563bc148e4e0ad09fe130ba2246d426ea6",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "fc1141a530dfc91f0ee19b7f422a2d24829584bc",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "d62b808d5c68a931ad0849a00a5e3be3dd7e0019",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "30880e9df27332403dd638a82c27921134b3630b",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "cfd6f1a7b42f62523c96d9703ef32b0dbc495ba4",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_fs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.302",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.247",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.197",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.302",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.247",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.197",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.159",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.117",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.58",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_fs: Fix epfile null pointer access after ep enable.\n\nA race condition occurs when ffs_func_eps_enable() runs concurrently\nwith ffs_data_reset(). The ffs_data_clear() called in ffs_data_reset()\nsets ffs-\u003eepfiles to NULL before resetting ffs-\u003eeps_count to 0, leading\nto a NULL pointer dereference when accessing epfile-\u003eep in\nffs_func_eps_enable() after successful usb_ep_enable().\n\nThe ffs-\u003eepfiles pointer is set to NULL in both ffs_data_clear() and\nffs_data_close() functions, and its modification is protected by the\nspinlock ffs-\u003eeps_lock. And the whole ffs_func_eps_enable() function\nis also protected by ffs-\u003eeps_lock.\n\nThus, add NULL pointer handling for ffs-\u003eepfiles in the\nffs_func_eps_enable() function to fix issues"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-08T00:46:41.896Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b00d2572c16e8e59e979960d3383c2ae9cebd195"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c0dbd240be3f87cac321b14e17979b7e9cb6a8f"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ec40fba7357df2d36f4c2e2f3b9b1a4fba0a272"
        },
        {
          "url": "https://git.kernel.org/stable/c/c53e90563bc148e4e0ad09fe130ba2246d426ea6"
        },
        {
          "url": "https://git.kernel.org/stable/c/fc1141a530dfc91f0ee19b7f422a2d24829584bc"
        },
        {
          "url": "https://git.kernel.org/stable/c/d62b808d5c68a931ad0849a00a5e3be3dd7e0019"
        },
        {
          "url": "https://git.kernel.org/stable/c/30880e9df27332403dd638a82c27921134b3630b"
        },
        {
          "url": "https://git.kernel.org/stable/c/cfd6f1a7b42f62523c96d9703ef32b0dbc495ba4"
        }
      ],
      "title": "usb: gadget: f_fs: Fix epfile null pointer access after ep enable.",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40315",
    "datePublished": "2025-12-08T00:46:41.896Z",
    "dateReserved": "2025-04-16T07:20:57.186Z",
    "dateUpdated": "2025-12-08T00:46:41.896Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-XQQ2-8462-XJG2

CVE-2025-40315 (GCVE-0-2025-40315)

Tags

Sightings

Nomenclature