CVE-2021-47165: drm/meson: fix shutdown crash when component not probed

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-03-25 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: drm/meson: fix shutdown crash when component not probed When main component is not probed, by example when the dw-hdmi module is not loaded yet or in probe defer, the following crash appears on shutdown: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000038 ... pc : meson_drv_shutdown+0x24/0x50 lr : platform_drv_shutdown+0x20/0x30 ... Call trace: meson_drv_shutdown+0x24/0x50 platform_drv_shutdown+0x20/0x30 device_shutdown+0x158/0x360 kernel_restart_prepare+0x38/0x48 kernel_restart+0x18/0x68 __do_sys_reboot+0x224/0x250 __arm64_sys_reboot+0x24/0x30 ... Simply check if the priv struct has been allocated before using it.

Affected products

Linux kernel: from 4.14.226 before 4.14.235; from 4.19.181 before 4.19.193; from 5.4.106 before 5.4.124; from 5.10.24 before 5.10.42; from 5.12 before 5.12.9; 5.13-rc1, 5.13-rc2, 5.13-rc3 — fixed in 4.14.235, 4.19.193, 5.10.42, 5.12.9, 5.4.124

How to fix

Upgrade to a fixed version: Linux kernel 4.14.235, 4.19.193, 5.10.42, 5.12.9. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2021-47165 or the next vulnerability affects your stack