Linux Kernel up to 6.12.103/6.18.44/7.1.8 Display drm/amd/display dce110_set_avmute null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.43

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.12.103/6.18.44/7.1.8. This affects the function dce110_set_avmute of the file drm/amd/display of the component Display. Performing a manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2026-74732. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.12.103/6.18.44/7.1.8. This affects the function dce110_set_avmute of the file drm/amd/display of the component Display. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Check for tg ops in dce110_set_avmute Some older DCE timing generators do not implement is_tg_enabled in their ops table. Calling it unconditionally when waiting for AV mute frames causes a NULL pointer dereference on Southern Islands dGPUs when turning the display off over HDMI. Check that tg and the required ops exist before waiting for frames. (cherry picked from commit 2686a0c0aaa07bec2e24131835cf27b5fd4935a5)

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-74732 since 08/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 339020 (Linux Distros Unpatched Vulnerability : CVE-2026-74732), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.104, 6.18.45 or 7.1.9 eliminates this vulnerability. Applying the patch 853c2d31408bd45dcf92d0eb1f06eb439a56cf04/d089f32d34f821c8f0ef23d5fcd77bd43c1b3b92/5edbb409b0bc5001195f4b7cfca19122361211a1/3141e3d61469bba2624a91c5e2407f110b33b29e is able to eliminate this problem.

The vulnerability is also documented in the databases at Tenable (339020) and EUVD (EUVD-2026-64419). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 339020
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-74732

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.104/6.18.45/7.1.9
Patch: 853c2d31408bd45dcf92d0eb1f06eb439a56cf04/d089f32d34f821c8f0ef23d5fcd77bd43c1b3b92/5edbb409b0bc5001195f4b7cfca19122361211a1/3141e3d61469bba2624a91c5e2407f110b33b29e

Timelineinfo

08/15/2026 CVE reserved
08/22/2026 +7 days Advisory disclosed
08/22/2026 +0 days VulDB entry created
08/23/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74732 (🔒)
GCVE (CVE): GCVE-0-2026-74732
GCVE (VulDB): GCVE-100-394479
EUVD: 🔒

Entryinfo

Created: 08/22/2026 18:58
Updated: 08/23/2026 09:57
Changes: 08/22/2026 18:58 (60), 08/22/2026 19:20 (1), 08/23/2026 09:57 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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