CVE-2025-21669 (GCVE-0-2025-21669)
Vulnerability from cvelistv5
Published
2025-01-31 11:25
Modified
2026-08-05 11:53
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: vsock/virtio: discard packets if the transport changes If the socket has been de-assigned or assigned to another transport, we must discard any packets received because they are not expected and would cause issues when we access vsk->transport. A possible scenario is described by Hyunwoo Kim in the attached link, where after a first connect() interrupted by a signal, and a second connect() failed, we can find `vsk->transport` at NULL, leading to a NULL pointer dereference.
References
Impacted products
Vendor Product Version
Linux Linux Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
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resolved:\\n\\nvsock/virtio: discard packets if the transport changes\\n\\nIf the socket has been de-assigned or assigned to another transport,\\nwe must discard any packets received because they are not expected\\nand would cause issues when we access vsk-\u003etransport.\\n\\nA possible scenario is described by Hyunwoo Kim in the attached link,\\nwhere after a first connect() interrupted by a signal, and a second\\nconnect() failed, we can find `vsk-\u003etransport` at NULL, leading to a\\nNULL pointer dereference.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.234\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.177\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", 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      "cveMetadata": "{\"cveId\": \"CVE-2025-21669\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:53:30.113Z\", \"dateReserved\": \"2024-12-29T08:45:45.735Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-01-31T11:25:33.185Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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