CVE-2021-47253: drm/amd/display: Fix potential memory leak in DMUB hw_init

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: 2024-05-21 · updated 2026-08-11
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix potential memory leak in DMUB hw_init [Why] On resume we perform DMUB hw_init which allocates memory: dm_resume->dm_dmub_hw_init->dc_dmub_srv_create->kzalloc That results in memory leak in suspend/resume scenarios. [How] Allocate memory for the DC wrapper to DMUB only if it was not allocated before. No need to reallocate it on suspend/resume.

Affected products

Linux kernel: before 5.10.45; from 5.11 before 5.12.12; 5.13-rc1, 5.13-rc2, 5.13-rc3, 5.13-rc4 — fixed in 5.10.45, 5.12.12

How to fix

Upgrade to a fixed version: Linux kernel 5.10.45, 5.12.12. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2021-47253 or the next vulnerability affects your stack