github - ghsa-3qv5-2654-5g25

GHSA-3QV5-2654-5G25

Vulnerability from github – Published: 2025-08-19 18:31 – Updated: 2025-11-03 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix null pointer dereference error in generate_encryptionkey

If client send two session setups with krb5 authenticate to ksmbd, null pointer dereference error in generate_encryptionkey could happen. sess->Preauth_HashValue is set to NULL if session is valid. So this patch skip generate encryption key if session is valid.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38562"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-19T17:15:32Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix null pointer dereference error in generate_encryptionkey\n\nIf client send two session setups with krb5 authenticate to ksmbd,\nnull pointer dereference error in generate_encryptionkey could happen.\nsess-\u003ePreauth_HashValue is set to NULL if session is valid.\nSo this patch skip generate encryption key if session is valid.",
  "id": "GHSA-3qv5-2654-5g25",
  "modified": "2025-11-03T18:31:33Z",
  "published": "2025-08-19T18:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38562"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/015ef163d65496ae3ba6192c96140a22743f0353"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a30ed6428ce83afedca1a6c5c5c4247bcf12d0e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96a82e19434a2522525baab59c33332658bc7653"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b493ab6f35178afd8d619800df9071992f715de"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c2dbbc959e1fcc6f603a1a843e9cf743ba383bb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d79c8bebaa622ee223128be7c66d8aaeeb634a57"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-25-917"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-38562 (GCVE-0-2025-38562)

Vulnerability from cvelistv5 – Published: 2025-08-19 17:02 – Updated: 2025-11-03 17:39

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference error in generate_encryptionkey If client send two session setups with krb5 authenticate to ksmbd, null pointer dereference error in generate_encryptionkey could happen. sess->Preauth_HashValue is set to NULL if session is valid. So this patch skip generate encryption key if session is valid.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/96a82e19434a25225…
	https://git.kernel.org/stable/c/d79c8bebaa622ee22…
	https://git.kernel.org/stable/c/2a30ed6428ce83afe…
	https://git.kernel.org/stable/c/015ef163d65496ae3…
	https://git.kernel.org/stable/c/9c2dbbc959e1fcc6f…
	https://git.kernel.org/stable/c/9b493ab6f35178afd…
	https://www.zerodayinitiative.com/advisories/ZDI-…

Impacted products

Vendor

Product

Version

Linux

Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 96a82e19434a2522525baab59c33332658bc7653 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < d79c8bebaa622ee223128be7c66d8aaeeb634a57 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 2a30ed6428ce83afedca1a6c5c5c4247bcf12d0e (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 015ef163d65496ae3ba6192c96140a22743f0353 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 9c2dbbc959e1fcc6f603a1a843e9cf743ba383bb (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 9b493ab6f35178afd8d619800df9071992f715de (git)

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)

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date

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.

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GHSA-3QV5-2654-5G25

CVE-2025-38562 (GCVE-0-2025-38562)

Tags

Sightings

Nomenclature