CVE-2024-50266

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

clk: qcom: videocc-sm8350: use HW_CTRL_TRIGGER for vcodec GDSCs

A recent change in the venus driver results in a stuck clock on the

Lenovo ThinkPad X13s, for example, when streaming video in firefox:

video_cc_mvs0_clk status stuck at 'off'

WARNING: CPU: 6 PID: 2885 at drivers/clk/qcom/clk-branch.c:87 clk_branch_wait+0x144/0x15c

...

Call trace:

clk_branch_wait+0x144/0x15c

clk_branch2_enable+0x30/0x40

clk_core_enable+0xd8/0x29c

clk_enable+0x2c/0x4c

vcodec_clks_enable.isra.0+0x94/0xd8 [venus_core]

coreid_power_v4+0x464/0x628 [venus_core]

vdec_start_streaming+0xc4/0x510 [venus_dec]

vb2_start_streaming+0x6c/0x180 [videobuf2_common]

vb2_core_streamon+0x120/0x1dc [videobuf2_common]

vb2_streamon+0x1c/0x6c [videobuf2_v4l2]

v4l2_m2m_ioctl_streamon+0x30/0x80 [v4l2_mem2mem]

v4l_streamon+0x24/0x30 [videodev]

using the out-of-tree sm8350/sc8280xp venus support. [1]

Update also the sm8350/sc8280xp GDS

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References