Linux Kernel up to 5.14.14 AMD GPU Display Driver Debug Filesystem amdgpu_dm_debugfs.c dp_link_settings_write heap-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.1$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 5.14.14. This impacts the function dp_link_settings_write of the file drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c of the component AMD GPU Display Driver Debug Filesystem. Performing a manipulation results in heap-based overflow. This vulnerability is known as CVE-2021-42327. Remote exploitation of the attack is possible. No exploit is available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 5.14.14 (Operating System). This affects the function dp_link_settings_write of the file drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c of the component AMD GPU Display Driver Debug Filesystem. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability.

The weakness was published 10/22/2021. The advisory is shared at mail-archive.com. This vulnerability is uniquely identified as CVE-2021-42327 since 10/12/2021. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/09/2025).

The vulnerability scanner Nessus provides a plugin with the ID 247084 (Linux Distros Unpatched Vulnerability : CVE-2021-42327), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the vulnerability database at Tenable (247084). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 8.1

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 247084
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-42327

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

10/12/2021 🔍
10/22/2021 +10 days 🔍
10/22/2021 +0 days 🔍
08/09/2025 +1387 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: mail-archive.com
Status: Confirmed

CVE: CVE-2021-42327 (🔍)
GCVE (CVE): GCVE-0-2021-42327
GCVE (VulDB): GCVE-100-185205

Entryinfo

Created: 10/22/2021 07:13
Updated: 08/09/2025 21:09
Changes: 10/22/2021 07:13 (43), 10/28/2021 14:26 (1), 10/28/2021 14:28 (18), 08/09/2025 21:09 (16)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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