CVE-2025-21956 (GCVE-0-2025-21956)

Vulnerability from cvelistv5 – Published: 2025-04-01 15:46 – Updated: 2026-05-11 21:09
VLAI
Title
drm/amd/display: Assign normalized_pix_clk when color depth = 14
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Assign normalized_pix_clk when color depth = 14 [WHY & HOW] A warning message "WARNING: CPU: 4 PID: 459 at ... /dc_resource.c:3397 calculate_phy_pix_clks+0xef/0x100 [amdgpu]" occurs because the display_color_depth == COLOR_DEPTH_141414 is not handled. This is observed in Radeon RX 6600 XT. It is fixed by assigning pix_clk * (14 * 3) / 24 - same as the rests. Also fixes the indentation in get_norm_pix_clk. (cherry picked from commit 274a87eb389f58eddcbc5659ab0b180b37e92775)
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 54/100 over 6624 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < cca3ab74f90176099b6392e8e894b52b27b3d080 (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 0174a2e5770efee9dbd4b58963ed4d939298ff5e (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 0c0016712e5dc23ce4a7e673cbebc24a535d8c8a (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < dc831b38680c47d07e425871a9852109183895cf (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < a8f77e1658d78e4a8bb227a83bcee67de97f7634 (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 04f90b505ad3a6eed474bbaa03167095fef5203a (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 27df30106690969f7d63604f0d49ed8e9bffa2cb (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 79e31396fdd7037c503e6add15af7cb00633ea92 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 5.4.292 , ≤ 5.4.* (semver)
Unaffected: 5.10.236 , ≤ 5.10.* (semver)
Unaffected: 5.15.180 , ≤ 5.15.* (semver)
Unaffected: 6.1.132 , ≤ 6.1.* (semver)
Unaffected: 6.6.84 , ≤ 6.6.* (semver)
Unaffected: 6.12.20 , ≤ 6.12.* (semver)
Unaffected: 6.13.8 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: Asignar normalized_pix_clk cuando la profundidad de color es 14 [POR QU\u00c9 Y C\u00d3MO] Se produce un mensaje de advertencia \"ADVERTENCIA: CPU: 4 PID: 459 en ... /dc_resource.c:3397 calculate_phy_pix_clks+0xef/0x100 [amdgpu]\" porque no se gestiona la profundidad de color de la pantalla = COLOR_DEPTH_141414. Esto se observa en la Radeon RX 6600 XT. Se soluciona asignando pix_clk * (14 * 3) / 24, igual que el resto. Tambi\u00e9n se corrige la sangr\u00eda en get_norm_pix_clk. (Seleccionado de el commit 274a87eb389f58eddcbc5659ab0b180b37e92775)"
          }
        ],
        "id": "CVE-2025-21956",
        "lastModified": "2026-06-17T08:44:42.237",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-04-01T16:15:26.810",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0174a2e5770efee9dbd4b58963ed4d939298ff5e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/04f90b505ad3a6eed474bbaa03167095fef5203a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0c0016712e5dc23ce4a7e673cbebc24a535d8c8a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/27df30106690969f7d63604f0d49ed8e9bffa2cb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/79e31396fdd7037c503e6add15af7cb00633ea92"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a8f77e1658d78e4a8bb227a83bcee67de97f7634"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/cca3ab74f90176099b6392e8e894b52b27b3d080"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/dc831b38680c47d07e425871a9852109183895cf"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:23:55+00:00",
      "cve": "CVE-2025-21956",
      "id": "CVE-2025-21956",
      "initial_release_date": "2025-04-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amd/display: Assign normalized_pix_clk when color depth = 14",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21956.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-30T15:36:04Z",
      "cve": "CVE-2025-21956",
      "id": "CVE-2025-21956",
      "initial_release_date": "2025-04-04T02:58:39Z",
      "product_status:known_affected": "406",
      "product_status:known_not_affected": "342",
      "product_status:recommended": "410",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-21956",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-21956.json",
      "version": "44"
    }
  }
}



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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

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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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.