Vulnerability-Lookup

FKIE_CVE-2026-80751

Vulnerability from fkie_nvd - Published: 2026-09-03 13:06 - Updated: 2026-09-04 05:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: pmdomain: mediatek: mfg: initialize prev_o in mtk_mfg_attach_dev() mtk_mfg_attach_dev() reads prev_o on the first iteration of its loop, in "if (prev_o && prev_o->freq == o->freq)", before prev_o is assigned at the end of the loop body. On that first iteration, evaluating prev_o reads an indeterminate value. If it is non-NULL, the condition dereferences a stale or invalid pointer, potentially faulting or incorrectly skipping the first OPP. Initialize prev_o to NULL. This matches the intent as well: there is no previous OPP to compare against on the first iteration. Found with Clang's -Wconditional-uninitialized.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/090a95dbe13df9965279b588d97eda134831769c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pmdomain/mediatek/mtk-mfg-pmdomain.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4",
              "status": "affected",
              "version": "f08e7a4e8d6ac4de677727af352ea33c6ce9f444",
              "versionType": "git"
            },
            {
              "lessThan": "090a95dbe13df9965279b588d97eda134831769c",
              "status": "affected",
              "version": "f08e7a4e8d6ac4de677727af352ea33c6ce9f444",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/pmdomain/mediatek/mtk-mfg-pmdomain.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npmdomain: mediatek: mfg: initialize prev_o in mtk_mfg_attach_dev()\n\nmtk_mfg_attach_dev() reads prev_o on the first iteration of its loop,\nin \"if (prev_o \u0026\u0026 prev_o-\u003efreq == o-\u003efreq)\", before prev_o is assigned\nat the end of the loop body. On that first iteration, evaluating prev_o\nreads an indeterminate value. If it is non-NULL, the condition\ndereferences a stale or invalid pointer, potentially faulting or\nincorrectly skipping the first OPP.\n\nInitialize prev_o to NULL. This matches the intent as well: there is no\nprevious OPP to compare against on the first iteration.\n\nFound with Clang\u0027s -Wconditional-uninitialized."
    }
  ],
  "id": "CVE-2026-80751",
  "lastModified": "2026-09-04T05:17:15.100",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-03T13:06:14.770",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/090a95dbe13df9965279b588d97eda134831769c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-80751 (GCVE-0-2026-80751)

Vulnerability from cvelistv5 – Published: 2026-09-03 08:26 – Updated: 2026-09-04 04:58

Title

pmdomain: mediatek: mfg: initialize prev_o in mtk_mfg_attach_dev()

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6637 records in the last 180 days details

References

2 references

URL	Tags
https://git.kernel.org/stable/c/de4eec0dfde8c0e27…
https://git.kernel.org/stable/c/090a95dbe13df9965…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f08e7a4e8d6ac4de677727af352ea33c6ce9f444 , < de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4 (git) Affected: f08e7a4e8d6ac4de677727af352ea33c6ce9f444 , < 090a95dbe13df9965279b588d97eda134831769c (git)
Linux	Linux	Affected: 6.19 Unaffected: 0 , < 6.19 (semver) Unaffected: 7.1.10 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pmdomain/mediatek/mtk-mfg-pmdomain.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4",
              "status": "affected",
              "version": "f08e7a4e8d6ac4de677727af352ea33c6ce9f444",
              "versionType": "git"
            },
            {
              "lessThan": "090a95dbe13df9965279b588d97eda134831769c",
              "status": "affected",
              "version": "f08e7a4e8d6ac4de677727af352ea33c6ce9f444",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/pmdomain/mediatek/mtk-mfg-pmdomain.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.10",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npmdomain: mediatek: mfg: initialize prev_o in mtk_mfg_attach_dev()\n\nmtk_mfg_attach_dev() reads prev_o on the first iteration of its loop,\nin \"if (prev_o \u0026\u0026 prev_o-\u003efreq == o-\u003efreq)\", before prev_o is assigned\nat the end of the loop body. On that first iteration, evaluating prev_o\nreads an indeterminate value. If it is non-NULL, the condition\ndereferences a stale or invalid pointer, potentially faulting or\nincorrectly skipping the first OPP.\n\nInitialize prev_o to NULL. This matches the intent as well: there is no\nprevious OPP to compare against on the first iteration.\n\nFound with Clang\u0027s -Wconditional-uninitialized."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - mtk_mfg_attach_dev() is only reached from the local kernel genpd attach path (panthor/Mali GPU probe \u2192 devm_pm_domain_attach_list \u2192 genpd_add_device) on MediaTek MT8196/MT6991 SoCs; there is no network, Bluetooth, or USB/physical-bus packet handler into this MFlexGraphics pmdomain code.\nAC:L - On the first loop iteration prev_o is read before assignment; on typical ARM64 kernel stacks the uninitialized slot frequently holds non-zero garbage, so the stale prev_o-\u003efreq dereference is reached deterministically during GPU power-domain attach at boot without races or attacker-uncontrollable timing.\nPR:L - The vulnerable path runs automatically when the Mali/panthor GPU binds to the MediaTek MFG genpd during boot on MT8196/MT6991 phones, Chromebooks, and embedded boards; sysfs driver rebind also reaches it with only local administrator access, not init-namespace root beyond ordinary local privilege.\nUI:N - No victim interaction such as opening files, mounting filesystems, or clicking prompts is required; GPU power-domain attachment and OPP registration occur automatically as part of normal platform driver probe during system bring-up.\nS:U - Impact is confined to kernel GPU power-domain and OPP setup on the same host; it does not cross VM, container, IOMMU, or firmware trust boundaries in a way that changes CVSS scope.\nC:H - When the uninitialized prev_o is non-NULL the kernel dereferences a stale stack-derived pointer to read dev_pm_opp_data.freq, exposing contents from an attacker-uncontrolled kernel address; CNA guidance treats invalid-pointer reads as high confidentiality impact.\nI:H - Beyond the stray read, incorrectly skipping the first OPP corrupts the dynamically built GPU dev_pm_opp table used by devfreq and DVFS consumers, constituting kernel memory integrity compromise that can be leveraged for further exploitation on Mali GPU deployments.\nA:H - Dereferencing a stale or invalid prev_o during GPU attach can cause an immediate kernel OOPS/panic, failing Mali/panthor probe and denying GPU availability on affected MediaTek devices until reboot or driver recovery."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T04:58:31.507Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4"
        },
        {
          "url": "https://git.kernel.org/stable/c/090a95dbe13df9965279b588d97eda134831769c"
        }
      ],
      "title": "pmdomain: mediatek: mfg: initialize prev_o in mtk_mfg_attach_dev()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80751",
    "datePublished": "2026-09-03T08:26:31.347Z",
    "dateReserved": "2026-08-26T14:34:25.790Z",
    "dateUpdated": "2026-09-04T04:58:31.507Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

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