CVE-2026-23228 (GCVE-0-2026-23228)

Vulnerability from cvelistv5 – Published: 2026-02-18 14:53 – Updated: 2026-02-18 14:53
VLAI?
Title
smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection() On kthread_run() failure in ksmbd_tcp_new_connection(), the transport is freed via free_transport(), which does not decrement active_num_conn, leaking this counter. Replace free_transport() with ksmbd_tcp_disconnect().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 787769c8cc50416af7b8b1a36e6bcd6aaa7680aa (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < baf664fc90a6139a39a58333e4aaa390c10d45dc (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cd25e0d809531a67e9dd53b19012d27d2b13425f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 599271110c35f6b16e2e4e45b9fbd47ed378c982 (git)
Create a notification for this product.
    Linux Linux Unaffected: 6.6.125 , ≤ 6.6.* (semver)
Unaffected: 6.12.72 , ≤ 6.12.* (semver)
Unaffected: 6.18.11 , ≤ 6.18.* (semver)
Unaffected: 6.19.1 , ≤ 6.19.* (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/transport_tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "787769c8cc50416af7b8b1a36e6bcd6aaa7680aa",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "baf664fc90a6139a39a58333e4aaa390c10d45dc",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "cd25e0d809531a67e9dd53b19012d27d2b13425f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "599271110c35f6b16e2e4e45b9fbd47ed378c982",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/transport_tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.125",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.72",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.125",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.72",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()\n\nOn kthread_run() failure in ksmbd_tcp_new_connection(), the transport is\nfreed via free_transport(), which does not decrement active_num_conn,\nleaking this counter.\n\nReplace free_transport() with ksmbd_tcp_disconnect()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-18T14:53:31.882Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/787769c8cc50416af7b8b1a36e6bcd6aaa7680aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/baf664fc90a6139a39a58333e4aaa390c10d45dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd25e0d809531a67e9dd53b19012d27d2b13425f"
        },
        {
          "url": "https://git.kernel.org/stable/c/599271110c35f6b16e2e4e45b9fbd47ed378c982"
        }
      ],
      "title": "smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23228",
    "datePublished": "2026-02-18T14:53:31.882Z",
    "dateReserved": "2026-01-13T15:37:45.988Z",
    "dateUpdated": "2026-02-18T14:53:31.882Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23228\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-18T16:22:32.580\",\"lastModified\":\"2026-02-18T17:51:53.510\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()\\n\\nOn kthread_run() failure in ksmbd_tcp_new_connection(), the transport is\\nfreed via free_transport(), which does not decrement active_num_conn,\\nleaking this counter.\\n\\nReplace free_transport() with ksmbd_tcp_disconnect().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/599271110c35f6b16e2e4e45b9fbd47ed378c982\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/787769c8cc50416af7b8b1a36e6bcd6aaa7680aa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/baf664fc90a6139a39a58333e4aaa390c10d45dc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cd25e0d809531a67e9dd53b19012d27d2b13425f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.