CVE-2022-49427

iommu/mediatek: Remove clk_disable in mtk_iommu_remove

MEDIUM

5.5

CVSS Score

Published: February 26, 2025 at 02:12 AM UTC

Updated: June 17, 2026 at 05:18 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.3%

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/mediatek: Remove clk_disable in mtk_iommu_remove After the commit b34ea31fe013 ("iommu/mediatek: Always enable the clk on resume"), the iommu clock is controlled by the runtime callback. thus remove the clk control in the mtk_iommu_remove. Otherwise, it will warning like: echo 14018000.iommu > /sys/bus/platform/drivers/mtk-iommu/unbind [ 51.413044] ------------[ cut here ]------------ [ 51.413648] vpp0_smi_iommu already disabled [ 51.414233] WARNING: CPU: 2 PID: 157 at */v5.15-rc1/kernel/mediatek/ drivers/clk/clk.c:952 clk_core_disable+0xb0/0xb8 [ 51.417174] Hardware name: MT8195V/C(ENG) (DT) [ 51.418635] pc : clk_core_disable+0xb0/0xb8 [ 51.419177] lr : clk_core_disable+0xb0/0xb8 ... [ 51.429375] Call trace: [ 51.429694] clk_core_disable+0xb0/0xb8 [ 51.430193] clk_core_disable_lock+0x24/0x40 [ 51.430745] clk_disable+0x20/0x30 [ 51.431189] mtk_iommu_remove+0x58/0x118 [ 51.431705] platform_remove+0x28/0x60 [ 51.432197] device_release_driver_internal+0x110/0x1f0 [ 51.432873] device_driver_detach+0x18/0x28 [ 51.433418] unbind_store+0xd4/0x108 [ 51.433886] drv_attr_store+0x24/0x38 [ 51.434363] sysfs_kf_write+0x40/0x58 [ 51.434843] kernfs_fop_write_iter+0x164/0x1e0

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

v ≥ 5.12.45.12.4 ≤ v < 5.135.12.4 ≤ v < 5.15.465.13 ≤ v < 5.15.465.13 ≤ v < 5.17.145.13 ≤ v < 5.18.35.13 ≤ v < 5.195.16 ≤ v < 5.17.145.18 ≤ v < 5.18.35.12.4 5.135cad9e2caa9613fdcd246bd4ebf0ffbec1cba2cab34ea31fe013569d42b7e8681ef3f717f77c5b72

Vendor states this is fixed in 053465ab20dcd324a43a1811ee98e5721e6a3e65 (fixed)

Vendor states this is fixed in 6eaa046c696c83542c56765cdde564d9818ff1fb (fixed)

Vendor states this is fixed in 98df772bdd1c4ce717a26289efea15cbbe4b64ed (fixed)

Vendor states this is fixed in 9b3bd97acb4f8954b8a43a5d63ed9050d463b4e1 (fixed)

Vendor states this is fixed in 5.13 (unaffected)

Vendor states this is fixed in 5.15.46 (unaffected)

Vendor states this is fixed in 5.17.14 (unaffected)

Vendor states this is fixed in 5.18.3 (unaffected)

Vendor states this is fixed in 5.19 (unaffected)