EUVD-2026-70355
GHSA-3f8w-94vm-5g9p
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Requires MediaTek GPU hardware and non-NULL uninitialized stack value (AC:H); impact is kernel crash (A:H) and OPP misconfiguration (I:L); no confidentiality pathway established.
Primary rating from Vendor (Linux).
CVSS VectorVendor: Linux
Lifecycle Timeline
6DescriptionCVE.org
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.
AnalysisAI
Uninitialized pointer dereference in the Linux kernel's MediaTek GPU power-domain driver (pmdomain/mediatek/mfg) can trigger a kernel fault or incorrect OPP (Operating Performance Point) configuration on first device attachment. The prev_o variable in mtk_mfg_attach_dev() is read in a conditional branch on the first loop iteration before ever being assigned, meaning it holds an indeterminate stack value; if that value is non-NULL, the kernel dereferences a stale or garbage pointer. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires local access with at least low-privilege user credentials on a system running an unpatched Linux kernel (between commit f08e7a4e8d6a and the fix commits) compiled with the MediaTek MFG power-domain driver (`CONFIG_MTK_MFG_POWER_DOMAIN` or equivalent enabled). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS 7.8 (C:H/I:H/A:H) likely overstates practical impact for this specific defect. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary fix is upgrading to patched kernel versions: Linux 6.19, 7.1.10, or 7.2. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory systems running Linux kernels affected by this vulnerability (versions from commit f08e7a4e8d6a through versions before 7.1.10, 7.2, or 6.19) using 'uname -r' or kernel release notes. …
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External POC / Exploit Code
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