github - ghsa-4hhj-gxrr-2grg

GHSA-4HHJ-GXRR-2GRG

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:

drm/amd/display: increase max link count and fix link->enc NULL pointer access

[why] 1.) dc->links[MAX_LINKS] array size smaller than actual requested. max_connector + max_dpia + 4 virtual = 14. increase from 12 to 14.

2.) hw_init() access null LINK_ENC for dpia non display_endpoint.

(cherry picked from commit d7f5a61e1b04ed87b008c8d327649d184dc5bb45)

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40354"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-16T14:15:47Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: increase max link count and fix link-\u003eenc NULL pointer access\n\n[why]\n1.) dc-\u003elinks[MAX_LINKS] array size smaller than actual requested.\nmax_connector + max_dpia + 4 virtual = 14.\nincrease from 12 to 14.\n\n2.) hw_init() access null LINK_ENC for dpia non display_endpoint.\n\n(cherry picked from commit d7f5a61e1b04ed87b008c8d327649d184dc5bb45)",
  "id": "GHSA-4hhj-gxrr-2grg",
  "modified": "2025-12-16T15:30:43Z",
  "published": "2025-12-16T15:30:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40354"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3fc0d36cfb927f8986b83bf5fba47dbedad3c63"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bec947cbe9a65783adb475a5fb47980d7b4f4796"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f28092be4e12b7df9e4f415d25bf0d767bc2d9ed"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-40354 (GCVE-0-2025-40354)

Vulnerability from cvelistv5 – Published: 2025-12-16 13:30 – Updated: 2025-12-20 08:52

Title

drm/amd/display: increase max link count and fix link->enc NULL pointer access

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: increase max link count and fix link->enc NULL pointer access [why] 1.) dc->links[MAX_LINKS] array size smaller than actual requested. max_connector + max_dpia + 4 virtual = 14. increase from 12 to 14. 2.) hw_init() access null LINK_ENC for dpia non display_endpoint. (cherry picked from commit d7f5a61e1b04ed87b008c8d327649d184dc5bb45)

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/f28092be4e12b7df9…
	https://git.kernel.org/stable/c/a3fc0d36cfb927f89…
	https://git.kernel.org/stable/c/bec947cbe9a65783a…

Impacted products

Vendor

Product

Version

Linux

Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < f28092be4e12b7df9e4f415d25bf0d767bc2d9ed (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < a3fc0d36cfb927f8986b83bf5fba47dbedad3c63 (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < bec947cbe9a65783adb475a5fb47980d7b4f4796 (git)

Linux

Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 6.12.56 , ≤ 6.12.* (semver)
Unaffected: 6.17.6 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c",
            "drivers/gpu/drm/amd/display/dc/inc/hw/hw_shared.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "defaultStatus": "affected",
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          "programFiles": [
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            "drivers/gpu/drm/amd/display/dc/inc/hw/hw_shared.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
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              "version": "0",
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      "cpeApplicability": [
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          "nodes": [
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                }
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: increase max link count and fix link-\u003eenc NULL pointer access\n\n[why]\n1.) dc-\u003elinks[MAX_LINKS] array size smaller than actual requested.\nmax_connector + max_dpia + 4 virtual = 14.\nincrease from 12 to 14.\n\n2.) hw_init() access null LINK_ENC for dpia non display_endpoint.\n\n(cherry picked from commit d7f5a61e1b04ed87b008c8d327649d184dc5bb45)"
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      "providerMetadata": {
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    "datePublished": "2025-12-16T13:30:27.082Z",
    "dateReserved": "2025-04-16T07:20:57.187Z",
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    "state": "PUBLISHED"
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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-4HHJ-GXRR-2GRG

CVE-2025-40354 (GCVE-0-2025-40354)

Tags

Sightings

Nomenclature