github - ghsa-wgwx-65v3-j243

GHSA-WGWX-65V3-J243

Vulnerability from github – Published: 2025-07-09 12:31 – Updated: 2025-11-03 18:31

Details

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

s390/pkey: Prevent overflow in size calculation for memdup_user()

Number of apqn target list entries contained in 'nr_apqns' variable is determined by userspace via an ioctl call so the result of the product in calculation of size passed to memdup_user() may overflow.

In this case the actual size of the allocated area and the value describing it won't be in sync leading to various types of unpredictable behaviour later.

Use a proper memdup_array_user() helper which returns an error if an overflow is detected. Note that it is different from when nr_apqns is initially zero - that case is considered valid and should be handled in subsequent pkey_handler implementations.

Found by Linux Verification Center (linuxtesting.org).

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38257"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-09T11:15:27Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/pkey: Prevent overflow in size calculation for memdup_user()\n\nNumber of apqn target list entries contained in \u0027nr_apqns\u0027 variable is\ndetermined by userspace via an ioctl call so the result of the product in\ncalculation of size passed to memdup_user() may overflow.\n\nIn this case the actual size of the allocated area and the value\ndescribing it won\u0027t be in sync leading to various types of unpredictable\nbehaviour later.\n\nUse a proper memdup_array_user() helper which returns an error if an\noverflow is detected. Note that it is different from when nr_apqns is\ninitially zero - that case is considered valid and should be handled in\nsubsequent pkey_handler implementations.\n\nFound by Linux Verification Center (linuxtesting.org).",
  "id": "GHSA-wgwx-65v3-j243",
  "modified": "2025-11-03T18:31:23Z",
  "published": "2025-07-09T12:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38257"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/73483ca7e07a5e39bdf612eec9d3d293e8bef649"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7360ee47599af91a1d5f4e74d635d9408a54e489"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/88f3869649edbc4a13f6c2877091f81cd5a50f05"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad1bdd24a02d5a8d119af8e4cd50933780a6d29f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f855b119e62b004a5044ed565f2a2b368c4d3f16"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/faa1ab4a23c42e34dc000ef4977b751d94d5148c"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-38257 (GCVE-0-2025-38257)

Vulnerability from cvelistv5 – Published: 2025-07-09 10:42 – Updated: 2025-11-03 17:35

Summary

In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Prevent overflow in size calculation for memdup_user() Number of apqn target list entries contained in 'nr_apqns' variable is determined by userspace via an ioctl call so the result of the product in calculation of size passed to memdup_user() may overflow. In this case the actual size of the allocated area and the value describing it won't be in sync leading to various types of unpredictable behaviour later. Use a proper memdup_array_user() helper which returns an error if an overflow is detected. Note that it is different from when nr_apqns is initially zero - that case is considered valid and should be handled in subsequent pkey_handler implementations. Found by Linux Verification Center (linuxtesting.org).

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/ad1bdd24a02d5a8d1…
	https://git.kernel.org/stable/c/faa1ab4a23c42e34d…
	https://git.kernel.org/stable/c/88f3869649edbc4a1…
	https://git.kernel.org/stable/c/f855b119e62b004a5…
	https://git.kernel.org/stable/c/73483ca7e07a5e39b…
	https://git.kernel.org/stable/c/7360ee47599af91a1…

Impacted products

Vendor

Product

Version

Linux

Affected: f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d , < ad1bdd24a02d5a8d119af8e4cd50933780a6d29f (git)
Affected: f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d , < faa1ab4a23c42e34dc000ef4977b751d94d5148c (git)
Affected: f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d , < 88f3869649edbc4a13f6c2877091f81cd5a50f05 (git)
Affected: f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d , < f855b119e62b004a5044ed565f2a2b368c4d3f16 (git)
Affected: f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d , < 73483ca7e07a5e39bdf612eec9d3d293e8bef649 (git)
Affected: f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d , < 7360ee47599af91a1d5f4e74d635d9408a54e489 (git)

Linux

Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.15.187 , ≤ 5.15.* (semver)
Unaffected: 6.1.143 , ≤ 6.1.* (semver)
Unaffected: 6.6.96 , ≤ 6.6.* (semver)
Unaffected: 6.12.36 , ≤ 6.12.* (semver)
Unaffected: 6.15.5 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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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.

Action not permitted

GHSA-WGWX-65V3-J243

CVE-2025-38257 (GCVE-0-2025-38257)

Tags

Sightings

Nomenclature