CVE-2025-39964 (GCVE-0-2025-39964)
Vulnerability from cvelistv5
Published
2025-10-13 13:48
Modified
2025-10-13 13:48
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg Issuing two writes to the same af_alg socket is bogus as the data will be interleaved in an unpredictable fashion. Furthermore, concurrent writes may create inconsistencies in the internal socket state. Disallow this by adding a new ctx->write field that indiciates exclusive ownership for writing.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
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{
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: af_alg - Disallow concurrent writes in af_alg_sendmsg\n\nIssuing two writes to the same af_alg socket is bogus as the\ndata will be interleaved in an unpredictable fashion.  Furthermore,\nconcurrent writes may create inconsistencies in the internal\nsocket state.\n\nDisallow this by adding a new ctx-\u003ewrite field that indiciates\nexclusive ownership for writing."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-13T13:48:30.334Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/0f28c4adbc4a97437874c9b669fd7958a8c6d6ce"
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          "url": "https://git.kernel.org/stable/c/e4c1ec11132ec466f7362a95f36a506ce4dc08c9"
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          "url": "https://git.kernel.org/stable/c/1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8"
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          "url": "https://git.kernel.org/stable/c/7c4491b5644e3a3708f3dbd7591be0a570135b84"
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          "url": "https://git.kernel.org/stable/c/9aee87da5572b3a14075f501752e209801160d3d"
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        {
          "url": "https://git.kernel.org/stable/c/1b34cbbf4f011a121ef7b2d7d6e6920a036d5285"
        }
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      "title": "crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39964",
    "datePublished": "2025-10-13T13:48:30.334Z",
    "dateReserved": "2025-04-16T07:20:57.149Z",
    "dateUpdated": "2025-10-13T13:48:30.334Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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