drm/msm/dpu: fix mismatch between power and frequency

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Summary

CVECVE-2026-53056
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 17:17:17 UTC
Updated2026-06-24 17:17:17 UTC
DescriptionIn 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/

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b0530eb1191307e9038d75e5c83973a396137681 1181a7028d37e0b1e720a36125a03f5db97e3d27 git Not specified
CNA Linux Linux affected b0530eb1191307e9038d75e5c83973a396137681 9830999c9e065c1813ec5435bfe4eab98ee54a87 git Not specified
CNA Linux Linux affected b0530eb1191307e9038d75e5c83973a396137681 c5735c7d0eef7a5240f9c1c66e44ba52a1be58d6 git Not specified
CNA Linux Linux affected b0530eb1191307e9038d75e5c83973a396137681 0f7dd5839cfabaf9c007fb718ec66e907a473c93 git Not specified
CNA Linux Linux affected b0530eb1191307e9038d75e5c83973a396137681 0ccf4f27b4652570b5de3de02a89a86435559de9 git Not specified
CNA Linux Linux affected b0530eb1191307e9038d75e5c83973a396137681 bc1dccc518cc5ab5140fba06c27e7188e0ed342b git Not specified
CNA Linux Linux affected 5.9 Not specified
CNA Linux Linux unaffected 5.9 semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.141 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.91 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.33 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/0ccf4f27b4652570b5de3de02a89a86435559de9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bc1dccc518cc5ab5140fba06c27e7188e0ed342b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9830999c9e065c1813ec5435bfe4eab98ee54a87 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c5735c7d0eef7a5240f9c1c66e44ba52a1be58d6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1181a7028d37e0b1e720a36125a03f5db97e3d27 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0f7dd5839cfabaf9c007fb718ec66e907a473c93 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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