Vulnerability-Lookup

GHSA-3F8W-94VM-5G9P

Vulnerability from github – Published: 2026-09-03 15:32 – Updated: 2026-09-03 15:32

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80751"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-03T13:06:14Z",
    "severity": null
  },
  "details": "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": "GHSA-3f8w-94vm-5g9p",
  "modified": "2026-09-03T15:32:16Z",
  "published": "2026-09-03T15:32:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80751"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/090a95dbe13df9965279b588d97eda134831769c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

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

Title

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

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.

Severity

No CVSS data available.

Assigner

Linux mitre root

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)

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  "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": [
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            },
            {
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              "status": "affected",
              "version": "f08e7a4e8d6ac4de677727af352ea33c6ce9f444",
              "versionType": "git"
            }
          ]
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          "programFiles": [
            "drivers/pmdomain/mediatek/mtk-mfg-pmdomain.c"
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          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.19"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
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          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "negate": false,
              "operator": "OR"
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        }
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      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-03T08:26:31.347Z",
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          "url": "https://git.kernel.org/stable/c/090a95dbe13df9965279b588d97eda134831769c"
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    "datePublished": "2026-09-03T08:26:31.347Z",
    "dateReserved": "2026-08-26T14:34:25.790Z",
    "dateUpdated": "2026-09-03T08:26:31.347Z",
    "state": "PUBLISHED"
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}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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GHSA-3F8W-94VM-5G9P

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

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Nomenclature