github - ghsa-3rcg-456g-86p6

GHSA-3RCG-456G-86P6

Vulnerability from github – Published: 2025-05-20 18:30 – Updated: 2025-12-07 00:30

Details

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

ksmbd: fix use-after-free in session logoff

The sess->user object can currently be in use by another thread, for example if another connection has sent a session setup request to bind to the session being free'd. The handler for that connection could be in the smb2_sess_setup function which makes use of sess->user.

Severity ?

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-37899"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-20T16:15:26Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free in session logoff\n\nThe sess-\u003euser object can currently be in use by another thread, for\nexample if another connection has sent a session setup request to\nbind to the session being free\u0027d. The handler for that connection could\nbe in the smb2_sess_setup function which makes use of sess-\u003euser.",
  "id": "GHSA-3rcg-456g-86p6",
  "modified": "2025-12-07T00:30:55Z",
  "published": "2025-05-20T18:30:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-37899"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02d16046cd11a5c037b28c12ffb818c56dd3ef43"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2fc9feff45d92a92cd5f96487655d5be23fb7e2b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70ad6455139e26e85f48f95d0e21f351c1909342"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/931dc8a3670f71c45c0b1379ea4e92dafbda1aca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5ec1d79509b3ee01de02c236f096bc050221b7f"
    },
    {
      "type": "WEB",
      "url": "https://news.ycombinator.com/item?id=44081338"
    },
    {
      "type": "WEB",
      "url": "https://sean.heelan.io/2025/05/22/how-i-used-o3-to-find-cve-2025-37899-a-remote-zeroday-vulnerability-in-the-linux-kernels-smb-implementation"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-37899 (GCVE-0-2025-37899)

Vulnerability from cvelistv5 – Published: 2025-05-20 15:21 – Updated: 2025-12-06 21:38

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in session logoff The sess->user object can currently be in use by another thread, for example if another connection has sent a session setup request to bind to the session being free'd. The handler for that connection could be in the smb2_sess_setup function which makes use of sess->user.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/931dc8a3670f71c45…
	https://git.kernel.org/stable/c/70ad6455139e26e85…
	https://git.kernel.org/stable/c/d5ec1d79509b3ee01…
	https://git.kernel.org/stable/c/02d16046cd11a5c03…
	https://git.kernel.org/stable/c/2fc9feff45d92a92c…

Impacted products

Vendor

Product

Version

Linux

Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 931dc8a3670f71c45c0b1379ea4e92dafbda1aca (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 70ad6455139e26e85f48f95d0e21f351c1909342 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < d5ec1d79509b3ee01de02c236f096bc050221b7f (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 02d16046cd11a5c037b28c12ffb818c56dd3ef43 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 2fc9feff45d92a92cd5f96487655d5be23fb7e2b (git)

Linux

Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.119 , ≤ 6.6.* (semver)
Unaffected: 6.12.28 , ≤ 6.12.* (semver)
Unaffected: 6.14.6 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-05-24T19:05:08.356Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://sean.heelan.io/2025/05/22/how-i-used-o3-to-find-cve-2025-37899-a-remote-zeroday-vulnerability-in-the-linux-kernels-smb-implementation/"
          },
          {
            "url": "https://news.ycombinator.com/item?id=44081338"
          }
        ],
        "title": "CVE Program Container",
        "x_generator": {
          "engine": "ADPogram 0.0.1"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "931dc8a3670f71c45c0b1379ea4e92dafbda1aca",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "70ad6455139e26e85f48f95d0e21f351c1909342",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "d5ec1d79509b3ee01de02c236f096bc050221b7f",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "02d16046cd11a5c037b28c12ffb818c56dd3ef43",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "2fc9feff45d92a92cd5f96487655d5be23fb7e2b",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.119",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.28",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.159",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.119",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.28",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14.6",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free in session logoff\n\nThe sess-\u003euser object can currently be in use by another thread, for\nexample if another connection has sent a session setup request to\nbind to the session being free\u0027d. The handler for that connection could\nbe in the smb2_sess_setup function which makes use of sess-\u003euser."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-06T21:38:20.677Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/931dc8a3670f71c45c0b1379ea4e92dafbda1aca"
        },
        {
          "url": "https://git.kernel.org/stable/c/70ad6455139e26e85f48f95d0e21f351c1909342"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5ec1d79509b3ee01de02c236f096bc050221b7f"
        },
        {
          "url": "https://git.kernel.org/stable/c/02d16046cd11a5c037b28c12ffb818c56dd3ef43"
        },
        {
          "url": "https://git.kernel.org/stable/c/2fc9feff45d92a92cd5f96487655d5be23fb7e2b"
        }
      ],
      "title": "ksmbd: fix use-after-free in session logoff",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37899",
    "datePublished": "2025-05-20T15:21:34.782Z",
    "dateReserved": "2025-04-16T04:51:23.965Z",
    "dateUpdated": "2025-12-06T21:38:20.677Z",
    "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-3RCG-456G-86P6

CVE-2025-37899 (GCVE-0-2025-37899)

Tags

Sightings

Nomenclature