FKIE_CVE-2025-40103

Vulnerability from fkie_nvd - Published: 2025-10-30 10:15 - Updated: 2026-06-17 09:21
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix refcount leak for cifs_sb_tlink Fix three refcount inconsistency issues related to `cifs_sb_tlink`. Comments for `cifs_sb_tlink` state that `cifs_put_tlink()` needs to be called after successful calls to `cifs_sb_tlink()`. Three calls fail to update refcount accordingly, leading to possible resource leaks.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/790282abe9d805f08618c1c24ea2529e7259b692
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/896bb31e1416f582503db1350cf1bd10dc64e5a6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2b77f42205ef485a647f62082c442c1cd69d3fc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3c8ea197055c260119a13360e8202a27e53e1e4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d7dd034c14928306db1b46be277ae439b84dacf9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e15605b68b490186da2ad8029c0351a9cfb0b9af
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/inode.c",
            "fs/smb/client/smb2ops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d3c8ea197055c260119a13360e8202a27e53e1e4",
              "status": "affected",
              "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "versionType": "git"
            },
            {
              "lessThan": "790282abe9d805f08618c1c24ea2529e7259b692",
              "status": "affected",
              "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "versionType": "git"
            },
            {
              "lessThan": "d7dd034c14928306db1b46be277ae439b84dacf9",
              "status": "affected",
              "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "versionType": "git"
            },
            {
              "lessThan": "e15605b68b490186da2ad8029c0351a9cfb0b9af",
              "status": "affected",
              "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "versionType": "git"
            },
            {
              "lessThan": "896bb31e1416f582503db1350cf1bd10dc64e5a6",
              "status": "affected",
              "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "versionType": "git"
            },
            {
              "lessThan": "c2b77f42205ef485a647f62082c442c1cd69d3fc",
              "status": "affected",
              "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/inode.c",
            "fs/smb/client/smb2ops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.7"
            },
            {
              "lessThan": "3.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.114",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.5",
              "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: client: Fix refcount leak for cifs_sb_tlink\n\nFix three refcount inconsistency issues related to `cifs_sb_tlink`.\n\nComments for `cifs_sb_tlink` state that `cifs_put_tlink()` needs to be\ncalled after successful calls to `cifs_sb_tlink()`. Three calls fail to\nupdate refcount accordingly, leading to possible resource leaks."
    }
  ],
  "id": "CVE-2025-40103",
  "lastModified": "2026-06-17T09:21:16.167",
  "metrics": {},
  "published": "2025-10-30T10:15:34.693",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/790282abe9d805f08618c1c24ea2529e7259b692"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/896bb31e1416f582503db1350cf1bd10dc64e5a6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c2b77f42205ef485a647f62082c442c1cd69d3fc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d3c8ea197055c260119a13360e8202a27e53e1e4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d7dd034c14928306db1b46be277ae439b84dacf9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e15605b68b490186da2ad8029c0351a9cfb0b9af"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}


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