Use-after-free in Linux kernel - CVE-2026-74320

Vulnerability identifier: #VU142872

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-74320

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to use-after-free in the sm501fb OF binding code when parsing device tree mode and EDID properties during framebuffer initialization. A local user can supply crafted property values or trigger affected initialization paths to cause a denial of service.

The issue also involves a double free, a buffer overrun, and memory leaks when both CRT and PANEL are enabled or when probe error paths are reached.

Linux kernel
Ubuntu
linux-nvidia (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-azure (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-nvidia (Ubuntu package) - addressed in versions 5.15.0-1112.113, 5.15.0.1112.112
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux (Ubuntu package) - addressed in versions 7.0.0-38.38, 7.0.0-38.38.1, 7.0.0-1008.9, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14, 7.0.0-1015.15
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1015.15
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1017.17

• https://git.kernel.org/stable/c/0bc3d909a49e1fd8b8c3f2160d526e672c40621d
• https://git.kernel.org/stable/c/47008d59c60ed896085da95f8d4dd40e1677dd3a
• https://git.kernel.org/stable/c/48cf0f4c6581ec90104cec9c5bf794a8bf347e30
• https://git.kernel.org/stable/c/9057e3f5db39f0ef0dac2f59f2bc59bf17e36c31
• https://git.kernel.org/stable/c/b2ff450f7f5cfc7143cab57c3ad70293ba8b822a
• https://git.kernel.org/stable/c/d374f76e1257ecc5d691a765c512ed2c29a44741
• https://git.kernel.org/stable/c/d8421e09382cfe0bd2a044c8b0a822f64855dd4e
• https://git.kernel.org/stable/c/de590cdf7efec8a0b6da90ae2ab5fc5df26810b9

• Use-after-free in Linux kernel video fbdev driver
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-azure-7.0
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-oem-7.0