CVE-2026-53056

In the Linux kernel, the following vulnerability has been resolved: drm/msm/dpu: fix mismatch between power and frequency During DPU runtime suspend, calling dev_pm_opp_set_rate(dev, 0) drops the MMCX rail to MIN_SVS while the core clock frequency remains at its original (highest) rate. When runtime resume re-enables the clock, this may result in a mismatch between the rail voltage and the clock rate. For example, in the DPU bind path, the sequence could be: cpu0: dev_sync_state -> rpmhpd_sync_state cpu1: dpu_kms_hw_init timeline 0 ------------------------------------------------> t After rpmhpd_sync_state, the voltage performance is no longer guaranteed to stay at the highest level. During dpu_kms_hw_init, calling dev_pm_opp_set_rate(dev, 0) drops the voltage, causing the MMCX rail to fall to MIN_SVS while the core clock is still at its maximum frequency. When the power is re-enabled, only the clock is enabled, leading to a situation where the MMCX rail is at MIN_SVS but the core clock is at its highest rate. In this state, the rail cannot sustain the clock rate, which may cause instability or system crash. Remove the call to dev_pm_opp_set_rate(dev, 0) from dpu_runtime_suspend to ensure the correct vote is restored when DPU resumes. Patchwork: https://patchwork.freedesktop.org/patch/710077/

• https://git.kernel.org/stable/c/0ccf4f27b4652570b5de3de02a89a86435559de9Patch
• https://git.kernel.org/stable/c/0f7dd5839cfabaf9c007fb718ec66e907a473c93Patch
• https://git.kernel.org/stable/c/1181a7028d37e0b1e720a36125a03f5db97e3d27Patch
• https://git.kernel.org/stable/c/9830999c9e065c1813ec5435bfe4eab98ee54a87Patch
• https://git.kernel.org/stable/c/bc1dccc518cc5ab5140fba06c27e7188e0ed342bPatch
• https://git.kernel.org/stable/c/c5735c7d0eef7a5240f9c1c66e44ba52a1be58d6Patch

Published

Jun 24, 2026

Last Modified

Jul 21, 2026

Status

Analyzed

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