Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.18.16/6.19.6/7.0-rc1. The affected element is the function drm_client_modeset_probe. This manipulation causes null pointer dereference. This vulnerability is registered as CVE-2026-23366. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.16/6.19.6/7.0-rc1. It has been declared as critical. Affected by this vulnerability is the function drm_client_modeset_probe. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/client: Do not destroy NULL modes 'modes' in drm_client_modeset_probe may fail to kcalloc. If this occurs, we jump to 'out', calling modes_destroy on it, which dereferences it. This may result in a NULL pointer dereference in the error case. Prevent that.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-23366 since 01/13/2026. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.18.17, 6.19.7 or 7.0-rc2 eliminates this vulnerability. Applying the patch 4e3ca5f82346cc23c0a71f1ceb006115ff6b0745/9aa3e33f0c7f2679ac599a09e3102c8f716a6321/c601fd5414315fc515f746b499110e46272e7243 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
• 6.18.9
• 6.18.10
• 6.18.11
• 6.18.12
• 6.18.13
• 6.18.14
• 6.18.15
• 6.18.16
• 6.19.0
• 6.19.1
• 6.19.2
• 6.19.3
• 6.19.4
• 6.19.5
• 6.19.6
• 7.0-rc1

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Discussion