drm/amd/display: Fix potential memory leak in DMUB hw_init (CVE-2021-47253) | HOL Guard CVE

Medium · CVSS 5.5CVE-2021-47253

drm/amd/display: Fix potential memory leak in DMUB hw_init

Answer in brief

CVE-2021-47253 records a Medium severity (CVSS 5.5) vulnerability in drm/amd/display: Fix potential memory leak in DMUB hw_init. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 21, 2024Updated Aug 11, 2026Source checked Sep 25, 2026First seen by HOL Aug 11, 2026Material review Aug 11, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.5
Exploitation: Not marked as known exploited
Affected software: 7 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc1::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc2::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc3::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc4::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=8c7aea404d55dabc71df792c850aed5536ece2fd <9e8c2af010463197315fa54a6c17e74988b5259c \|\| >=8c7aea404d55dabc71df792c850aed5536ece2fd <aa000f828e60ac15d6340f606ec4a673966f5b0b \|\| >=8c7aea404d55dabc71df792c850aed5536ece2fd <c5699e2d863f58221044efdc3fa712dd32d55cde	9e8c2af010463197315fa54a6c17e74988b5259c, aa000f828e60ac15d6340f606ec4a673966f5b0b, c5699e2d863f58221044efdc3fa712dd32d55cde
Linux/Linuxgeneric	5.6	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 9e8c2af010463197315fa54a6c17e74988b5259c if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
May 21, 2024
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 11, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.