CVE-2025-38561 (GCVE-0-2025-38561)

Vulnerability from cvelistv5 – Published: 2025-08-19 17:02 – Updated: 2026-05-11 21:30
VLAI
Title
ksmbd: fix Preauh_HashValue race condition
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix Preauh_HashValue race condition If client send multiple session setup requests to ksmbd, Preauh_HashValue race condition could happen. There is no need to free sess->Preauh_HashValue at session setup phase. It can be freed together with session at connection termination phase.
Severity
8.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < fbf5c0845ed15122a770bca9be1d9b60b470d3aa (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < b69fd87076daa66f3d186bd421a7b0ee0cb45829 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < edeecc7871e8fc0878d53ce286c75040a0e38f6c (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 7d7c0c5304c88bcbd7a85e9bcd61d27e998ba5fc (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 6613887da1d18dd2ecfd6c6148a873c4d903ebdc (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 44a3059c4c8cc635a1fb2afd692d0730ca1ba4b6 (git)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 6.1.148 , ≤ 6.1.* (semver)
Unaffected: 6.6.102 , ≤ 6.6.* (semver)
Unaffected: 6.12.42 , ≤ 6.12.* (semver)
Unaffected: 6.15.10 , ≤ 6.15.* (semver)
Unaffected: 6.16.1 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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\"https://git.kernel.org/stable/c/fbf5c0845ed15122a770bca9be1d9b60b470d3aa\"}, {\"url\": \"https://git.kernel.org/stable/c/b69fd87076daa66f3d186bd421a7b0ee0cb45829\"}, {\"url\": \"https://git.kernel.org/stable/c/edeecc7871e8fc0878d53ce286c75040a0e38f6c\"}, {\"url\": \"https://git.kernel.org/stable/c/7d7c0c5304c88bcbd7a85e9bcd61d27e998ba5fc\"}, {\"url\": \"https://git.kernel.org/stable/c/6613887da1d18dd2ecfd6c6148a873c4d903ebdc\"}, {\"url\": \"https://git.kernel.org/stable/c/44a3059c4c8cc635a1fb2afd692d0730ca1ba4b6\"}, {\"url\": \"https://www.zerodayinitiative.com/advisories/ZDI-25-916/\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nksmbd: fix Preauh_HashValue race condition\\n\\nIf client send multiple session setup requests to ksmbd,\\nPreauh_HashValue race condition could happen.\\nThere is no need to free sess-\u003ePreauh_HashValue at session setup phase.\\nIt can be freed together with session at connection termination phase.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.148\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.102\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.42\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.15.10\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.16.1\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": 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      "cveMetadata": "{\"cveId\": \"CVE-2025-38561\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T17:39:50.588Z\", \"dateReserved\": \"2025-04-16T04:51:24.025Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-08-19T17:02:38.719Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.