FKIE_CVE-2025-40285

Vulnerability from fkie_nvd - Published: 2025-12-06 22:15 - Updated: 2026-06-17 09:21
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: smb/server: fix possible refcount leak in smb2_sess_setup() Reference count of ksmbd_session will leak when session need reconnect. Fix this by adding the missing ksmbd_user_session_put().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/379510a815cb2e64eb0a379cb62295d6ade65df0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6fc935f798d44a8eb8a5e6659198399fbf57b981
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d37b2c81c83d6c0d5ca582f4fe73c672983f9e0d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dcc51dfe6ff26b52cac106865a172ac982d78401
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e671f9bb97805771380c98de944e2ceab6949188
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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": "6fc935f798d44a8eb8a5e6659198399fbf57b981",
              "status": "affected",
              "version": "37a0e2b362b3150317fb6e2139de67b1e29ae5ff",
              "versionType": "git"
            },
            {
              "lessThan": "e671f9bb97805771380c98de944e2ceab6949188",
              "status": "affected",
              "version": "450a844c045ff0895d41b05a1cbe8febd1acfcfd",
              "versionType": "git"
            },
            {
              "lessThan": "dcc51dfe6ff26b52cac106865a172ac982d78401",
              "status": "affected",
              "version": "a39e31e22a535d47b14656a7d6a893c7f6cf758c",
              "versionType": "git"
            },
            {
              "lessThan": "d37b2c81c83d6c0d5ca582f4fe73c672983f9e0d",
              "status": "affected",
              "version": "b95629435b84b9ecc0c765995204a4d8a913ed52",
              "versionType": "git"
            },
            {
              "lessThan": "379510a815cb2e64eb0a379cb62295d6ade65df0",
              "status": "affected",
              "version": "b95629435b84b9ecc0c765995204a4d8a913ed52",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "2107ab40629aeabbec369cf34b8cf0f288c3eb1b",
              "versionType": "git"
            },
            {
              "lessThan": "6.1.159",
              "status": "affected",
              "version": "6.1.121",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.117",
              "status": "affected",
              "version": "6.6.67",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.59",
              "status": "affected",
              "version": "6.12.6",
              "versionType": "semver"
            },
            {
              "lessThan": "5.16",
              "status": "affected",
              "version": "5.15.176",
              "versionType": "semver"
            }
          ]
        },
        {
          "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": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.59",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: fix possible refcount leak in smb2_sess_setup()\n\nReference count of ksmbd_session will leak when session need reconnect.\nFix this by adding the missing ksmbd_user_session_put()."
    }
  ],
  "id": "CVE-2025-40285",
  "lastModified": "2026-06-17T09:21:35.813",
  "metrics": {},
  "published": "2025-12-06T22:15:56.667",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/379510a815cb2e64eb0a379cb62295d6ade65df0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6fc935f798d44a8eb8a5e6659198399fbf57b981"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d37b2c81c83d6c0d5ca582f4fe73c672983f9e0d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dcc51dfe6ff26b52cac106865a172ac982d78401"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e671f9bb97805771380c98de944e2ceab6949188"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}


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Sightings

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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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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