CVE-2025-39964 (GCVE-0-2025-39964)
Vulnerability from cvelistv5
Published
2025-10-13 13:48
Modified
2026-08-05 12:06
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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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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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.245\", \"versionStartIncluding\": \"2.6.38\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.194\", \"versionStartIncluding\": \"2.6.38\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.154\", \"versionStartIncluding\": \"2.6.38\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.108\", \"versionStartIncluding\": \"2.6.38\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.49\", \"versionStartIncluding\": \"2.6.38\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.16.9\", \"versionStartIncluding\": \"2.6.38\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.17\", \"versionStartIncluding\": \"2.6.38\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-07-30T05:58:55.453Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-39964\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-30T05:58:55.453Z\", \"dateReserved\": \"2025-04-16T07:20:57.149Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-10-13T13:48:30.334Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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