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CVE-2026-80751

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

Description

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.

Timeline

  1. ID reserved

    By Linux

  2. · 8 days later

    Published

  3. · 1 day later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-80751, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Received3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.17% · top 94% of all CVEs (10 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Affected products

  • Linux · Linux

    • affected f08e7a4e8d6ac4de677727af352ea33c6ce9f444 – < de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4
    • affected f08e7a4e8d6ac4de677727af352ea33c6ce9f444 – < 090a95dbe13df9965279b588d97eda134831769c
  • Linux · Linux

    • affected 6.19
    • unaffected < 6.19
    • unaffected 7.1.10 – ≤ 7.1.*
    • unaffected 7.2 – ≤ *

References

2

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .