NULL pointer dereference in Linux kernel - CVE-2026-98404

Vulnerability identifier: #VU155915

CSH Severity: Low

CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98404

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to a null pointer dereference in drm_mode_addfb2() when virtio_gpu_user_framebuffer_create() returns a null pointer on an error path. A local user can trigger the framebuffer creation error path to cause a denial of service.

Linux kernel
Ubuntu
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-aws (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-nvidia-tegra (Ubuntu package) - update to 5.15.0-1070.72
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux (Ubuntu package) - update to 7.0.0-42.42
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• https://git.kernel.org/stable/c/07de0b31dd64094cd7d25729beaf2ecae74daa72
• https://git.kernel.org/stable/c/3fe8a33715265ecb24ca0bcd0a575c926da4277c
• https://git.kernel.org/stable/c/45dc2788a5b0e1e2824d1f98af521bd3acc340d7
• https://git.kernel.org/stable/c/5eda6cda0031ba17559d56882353be39e568ec09
• https://git.kernel.org/stable/c/94579f24e2b526a04eb41050af0ba018c6f528e7
• https://git.kernel.org/stable/c/974845d2535a250b180e62f9ed50284f312c01a3
• https://git.kernel.org/stable/c/975f3cf302bb7d7336df4c630a7c07e12780ad10
• https://git.kernel.org/stable/c/f1050a7d365283678b253828739d3866ae546a72

• NULL pointer dereference in Linux kernel drm virtio driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more
• Ubuntu update for linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-nvidia-tegra-igx
• Ubuntu update for linux, linux-aws, linux-aws-5.15 and more