github - ghsa-3qw8-vgp2-684r

GHSA-3QW8-VGP2-684R

Vulnerability from github – Published: 2025-12-16 15:30 – Updated: 2025-12-16 15:30

Details

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

arch_topology: Fix incorrect error check in topology_parse_cpu_capacity()

Fix incorrect use of PTR_ERR_OR_ZERO() in topology_parse_cpu_capacity() which causes the code to proceed with NULL clock pointers. The current logic uses !PTR_ERR_OR_ZERO(cpu_clk) which evaluates to true for both valid pointers and NULL, leading to potential NULL pointer dereference in clk_get_rate().

Per include/linux/err.h documentation, PTR_ERR_OR_ZERO(ptr) returns: "The error code within @ptr if it is an error pointer; 0 otherwise."

This means PTR_ERR_OR_ZERO() returns 0 for both valid pointers AND NULL pointers. Therefore !PTR_ERR_OR_ZERO(cpu_clk) evaluates to true (proceed) when cpu_clk is either valid or NULL, causing clk_get_rate(NULL) to be called when of_clk_get() returns NULL.

Replace with !IS_ERR_OR_NULL(cpu_clk) which only proceeds for valid pointers, preventing potential NULL pointer dereference in clk_get_rate().

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40346"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-16T14:15:46Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\narch_topology: Fix incorrect error check in topology_parse_cpu_capacity()\n\nFix incorrect use of PTR_ERR_OR_ZERO() in topology_parse_cpu_capacity()\nwhich causes the code to proceed with NULL clock pointers. The current\nlogic uses !PTR_ERR_OR_ZERO(cpu_clk) which evaluates to true for both\nvalid pointers and NULL, leading to potential NULL pointer dereference\nin clk_get_rate().\n\nPer include/linux/err.h documentation, PTR_ERR_OR_ZERO(ptr) returns:\n\"The error code within @ptr if it is an error pointer; 0 otherwise.\"\n\nThis means PTR_ERR_OR_ZERO() returns 0 for both valid pointers AND NULL\npointers. Therefore !PTR_ERR_OR_ZERO(cpu_clk) evaluates to true (proceed)\nwhen cpu_clk is either valid or NULL, causing clk_get_rate(NULL) to be\ncalled when of_clk_get() returns NULL.\n\nReplace with !IS_ERR_OR_NULL(cpu_clk) which only proceeds for valid\npointers, preventing potential NULL pointer dereference in clk_get_rate().",
  "id": "GHSA-3qw8-vgp2-684r",
  "modified": "2025-12-16T15:30:42Z",
  "published": "2025-12-16T15:30:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40346"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02fbea0864fd4a863671f5d418129258d7159f68"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2eead19334516c8e9927c11b448fbe512b1f18a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3373f263bb647fcc3b5237cfaef757633b9ee25e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a01b2614e84361aa222f67bc628593987e5cdb2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/45379303124487db3a81219af7565d41f498167f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64da320252e43456cc9ec3055ff567f168467b37"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a77f8434954cb1e9c42c3854e40855fdcf5ab235"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-40346 (GCVE-0-2025-40346)

Vulnerability from cvelistv5 – Published: 2025-12-16 13:30 – Updated: 2025-12-16 13:30

Title

arch_topology: Fix incorrect error check in topology_parse_cpu_capacity()

Summary

In the Linux kernel, the following vulnerability has been resolved: arch_topology: Fix incorrect error check in topology_parse_cpu_capacity() Fix incorrect use of PTR_ERR_OR_ZERO() in topology_parse_cpu_capacity() which causes the code to proceed with NULL clock pointers. The current logic uses !PTR_ERR_OR_ZERO(cpu_clk) which evaluates to true for both valid pointers and NULL, leading to potential NULL pointer dereference in clk_get_rate(). Per include/linux/err.h documentation, PTR_ERR_OR_ZERO(ptr) returns: "The error code within @ptr if it is an error pointer; 0 otherwise." This means PTR_ERR_OR_ZERO() returns 0 for both valid pointers AND NULL pointers. Therefore !PTR_ERR_OR_ZERO(cpu_clk) evaluates to true (proceed) when cpu_clk is either valid or NULL, causing clk_get_rate(NULL) to be called when of_clk_get() returns NULL. Replace with !IS_ERR_OR_NULL(cpu_clk) which only proceeds for valid pointers, preventing potential NULL pointer dereference in clk_get_rate().

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/64da320252e43456c…
	https://git.kernel.org/stable/c/02fbea0864fd4a863…
	https://git.kernel.org/stable/c/a77f8434954cb1e9c…
	https://git.kernel.org/stable/c/3373f263bb647fcc3…
	https://git.kernel.org/stable/c/45379303124487db3…
	https://git.kernel.org/stable/c/3a01b2614e84361aa…
	https://git.kernel.org/stable/c/2eead19334516c8e9…

Impacted products

Vendor

Product

Version

Linux

Affected: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 , < 64da320252e43456cc9ec3055ff567f168467b37 (git)
Affected: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 , < 02fbea0864fd4a863671f5d418129258d7159f68 (git)
Affected: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 , < a77f8434954cb1e9c42c3854e40855fdcf5ab235 (git)
Affected: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 , < 3373f263bb647fcc3b5237cfaef757633b9ee25e (git)
Affected: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 , < 45379303124487db3a81219af7565d41f498167f (git)
Affected: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 , < 3a01b2614e84361aa222f67bc628593987e5cdb2 (git)
Affected: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 , < 2eead19334516c8e9927c11b448fbe512b1f18a1 (git)

Linux

Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.246 , ≤ 5.10.* (semver)
Unaffected: 5.15.196 , ≤ 5.15.* (semver)
Unaffected: 6.1.158 , ≤ 6.1.* (semver)
Unaffected: 6.6.115 , ≤ 6.6.* (semver)
Unaffected: 6.12.56 , ≤ 6.12.* (semver)
Unaffected: 6.17.6 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)

Show details on NVD website

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              "status": "unaffected",
              "version": "6.17.6",
              "versionType": "semver"
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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-3QW8-VGP2-684R

CVE-2025-40346 (GCVE-0-2025-40346)

Tags

Sightings

Nomenclature