github - ghsa-4748-h423-7xq4

GHSA-4748-H423-7XQ4

Vulnerability from github – Published: 2025-05-01 15:31 – Updated: 2025-11-14 18:31

Details

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

ksmbd: fix use-after-free in __smb2_lease_break_noti()

Move tcp_transport free to ksmbd_conn_free. If ksmbd connection is referenced when ksmbd server thread terminates, It will not be freed, but conn->tcp_transport is freed. __smb2_lease_break_noti can be performed asynchronously when the connection is disconnected. __smb2_lease_break_noti calls ksmbd_conn_write, which can cause use-after-free when conn->ksmbd_transport is already freed.

Severity ?

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-37777"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-01T14:15:41Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free in __smb2_lease_break_noti()\n\nMove tcp_transport free to ksmbd_conn_free. If ksmbd connection is\nreferenced when ksmbd server thread terminates, It will not be freed,\nbut conn-\u003etcp_transport is freed. __smb2_lease_break_noti can be performed\nasynchronously when the connection is disconnected. __smb2_lease_break_noti\ncalls ksmbd_conn_write, which can cause use-after-free\nwhen conn-\u003eksmbd_transport is already freed.",
  "id": "GHSA-4748-h423-7xq4",
  "modified": "2025-11-14T18:31:18Z",
  "published": "2025-05-01T15:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-37777"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1da8bd9a10ecd718692732294d15fd801c0eabb5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e59796fc80603bcd8569d4d2e10b213c1918edb4"
    }
  ],
  "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-2025-37777 (GCVE-0-2025-37777)

Vulnerability from cvelistv5 – Published: 2025-05-01 13:07 – Updated: 2025-08-09 14:20

Title

ksmbd: fix use-after-free in __smb2_lease_break_noti()

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in __smb2_lease_break_noti() Move tcp_transport free to ksmbd_conn_free. If ksmbd connection is referenced when ksmbd server thread terminates, It will not be freed, but conn->tcp_transport is freed. __smb2_lease_break_noti can be performed asynchronously when the connection is disconnected. __smb2_lease_break_noti calls ksmbd_conn_write, which can cause use-after-free when conn->ksmbd_transport is already freed.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/1da8bd9a10ecd7186…
	https://git.kernel.org/stable/c/1aec4d14cf81b7b3e…
	https://git.kernel.org/stable/c/e59796fc80603bcd8…
	https://git.kernel.org/stable/c/21a4e47578d44c6b3…

Impacted products

Vendor

Product

Version

Linux

Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 1da8bd9a10ecd718692732294d15fd801c0eabb5 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < e59796fc80603bcd8569d4d2e10b213c1918edb4 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de (git)

Linux

Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 6.6.101 , ≤ 6.6.* (semver)
Unaffected: 6.12.26 , ≤ 6.12.* (semver)
Unaffected: 6.14.4 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/connection.c",
            "fs/smb/server/transport_tcp.c",
            "fs/smb/server/transport_tcp.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1da8bd9a10ecd718692732294d15fd801c0eabb5",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "e59796fc80603bcd8569d4d2e10b213c1918edb4",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/connection.c",
            "fs/smb/server/transport_tcp.c",
            "fs/smb/server/transport_tcp.h"
          ],
          "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": "6.6.*",
              "status": "unaffected",
              "version": "6.6.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.26",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.4",
              "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": "6.6.101",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.26",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14.4",
                  "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 __smb2_lease_break_noti()\n\nMove tcp_transport free to ksmbd_conn_free. If ksmbd connection is\nreferenced when ksmbd server thread terminates, It will not be freed,\nbut conn-\u003etcp_transport is freed. __smb2_lease_break_noti can be performed\nasynchronously when the connection is disconnected. __smb2_lease_break_noti\ncalls ksmbd_conn_write, which can cause use-after-free\nwhen conn-\u003eksmbd_transport is already freed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-09T14:20:09.676Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1da8bd9a10ecd718692732294d15fd801c0eabb5"
        },
        {
          "url": "https://git.kernel.org/stable/c/1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e"
        },
        {
          "url": "https://git.kernel.org/stable/c/e59796fc80603bcd8569d4d2e10b213c1918edb4"
        },
        {
          "url": "https://git.kernel.org/stable/c/21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de"
        }
      ],
      "title": "ksmbd: fix use-after-free in __smb2_lease_break_noti()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37777",
    "datePublished": "2025-05-01T13:07:15.741Z",
    "dateReserved": "2025-04-16T04:51:23.939Z",
    "dateUpdated": "2025-08-09T14:20:09.676Z",
    "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-4748-H423-7XQ4

CVE-2025-37777 (GCVE-0-2025-37777)

Tags

Sightings

Nomenclature