CVE-2026-46158 (GCVE-0-2026-46158)
Vulnerability from cvelistv5
Published
2026-05-28 09:36
Modified
2026-08-27 12:39
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: always decrease sk refcount When an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer(). It should then be released in all cases at the end. Some (unlikely) checks were returning directly instead of calling sock_put() to decrease the refcount. Jump to a new 'exit' label to call __sock_put() (which will become sock_put() in the next commit) to fix this potential leak. While at it, drop the '!msk' check which cannot happen because it is never reset, and explicitly mark the remaining one as "unlikely".
References
Impacted products
Vendor Product Version
Linux Linux Version: 00cfd77b9063dcdf3628a7087faba60de85a9cc8
Version: 00cfd77b9063dcdf3628a7087faba60de85a9cc8
Version: 00cfd77b9063dcdf3628a7087faba60de85a9cc8
Version: 00cfd77b9063dcdf3628a7087faba60de85a9cc8
Version: 00cfd77b9063dcdf3628a7087faba60de85a9cc8
Version: 00cfd77b9063dcdf3628a7087faba60de85a9cc8
Version: 00cfd77b9063dcdf3628a7087faba60de85a9cc8
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{
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: ADD_ADDR rtx: always decrease sk refcount\n\nWhen an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer().\nIt should then be released in all cases at the end.\n\nSome (unlikely) checks were returning directly instead of calling\nsock_put() to decrease the refcount. Jump to a new \u0027exit\u0027 label to call\n__sock_put() (which will become sock_put() in the next commit) to fix\nthis potential leak.\n\nWhile at it, drop the \u0027!msk\u0027 check which cannot happen because it is\nnever reset, and explicitly mark the remaining one as \"unlikely\"."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-27T12:39:39.980Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e9ba34301d2e90f63f97c76ad9eb98e5250fe961"
        },
        {
          "url": "https://git.kernel.org/stable/c/81d8142148164176385c279c7c1e1d581867423d"
        },
        {
          "url": "https://git.kernel.org/stable/c/9426265e157dd77ec237c795901ed4dea6d69b5c"
        },
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          "url": "https://git.kernel.org/stable/c/b41dd76f3b9735096c21d3e799a2b9fe36498d57"
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          "url": "https://git.kernel.org/stable/c/acd3d3562315c99f3c0db16f0fcc5f0306638982"
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          "url": "https://git.kernel.org/stable/c/25e37407442b8766ec2cf52fb4e31b5c3d3aeeae"
        },
        {
          "url": "https://git.kernel.org/stable/c/9634cb35af17019baec21ca648516ce376fa10e6"
        }
      ],
      "title": "mptcp: pm: ADD_ADDR rtx: always decrease sk refcount",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46158",
    "datePublished": "2026-05-28T09:36:13.821Z",
    "dateReserved": "2026-05-13T15:03:33.102Z",
    "dateUpdated": "2026-08-27T12:39:39.980Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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