Is CVE-2021-47534 in the CISA KEV catalog?

No. CVE-2021-47534 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-47534?

CVE-2021-47534 has a CVSS v3 base score of 4.1 (MEDIUM).

What is the EPSS score for CVE-2021-47534?

CVE-2021-47534 has an EPSS score of 0.18% (8th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-47534?

Upgrade linux on debian 12 to 5.15.15-1 or later.

CVE & CISA-KEV Catalog

CVE-2021-47534

MEDIUM

4.1

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: drm/vc4: kms: Add missing drm_crtc_commit_put Commit 9ec03d7f1ed3 ("drm/vc4: kms: Wait on previous FIFO users before a commit") introduced a global state for the HVS, with each FIFO storing the current CRTC commit so that we can properly synchronize commits. However, the refcounting was off and we thus ended up leaking the drm_crtc_commit structure every commit. Add a drm_crtc_commit_put to prevent the leakage.

How to fix

Remediation Available

linuxDebian

Fixed in:5.15.15-1CVE-2021-47534

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.18%probability of exploitation in 30 days

8thpercentile

Low risk: more likely to be exploited than 8% of all known CVEs.

References

Patch2

Embed a live status badge for CVE-2021-47534

Markdown

[![CVE-2021-47534](https://tridentstack.com/cve/badge/CVE-2021-47534.svg)](https://tridentstack.com/cve/CVE-2021-47534)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-47534"><img src="https://tridentstack.com/cve/badge/CVE-2021-47534.svg" alt="CVE-2021-47534"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-01.