CVE-2026-23366 drm/client: Do not destroy NULL modes

What is CVE-2026-23366?

CVE-2026-23366 is a medium-severity vulnerability in Linux kernel, published on 25 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-476

Which versions are affected by CVE-2026-23366?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-23366?

Apply the vendor's patch.

Is CVE-2026-23366 being exploited?

There is no known exploitation of CVE-2026-23366 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-23366, DEBIAN-CVE-2026-23366, GHSA-m3rw-wqqm-pcwv, UBUNTU-CVE-2026-23366.