NULL pointer dereference in Linux kernel - CVE-2026-53382

Vulnerability identifier: #VU138885

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-2026-53382

CWE-ID: CWE-476

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 a NULL pointer dereference in vidtv_mux_push_si when handling PID contexts during stream information processing. A local user can trigger allocation failure conditions that leave a PID context unset to cause a denial of service.

The issue can lead to a general protection fault in the vidtv test driver workqueue path.

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

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 7.0.0-31.31, 7.0.0-31.31.1, 7.0.0-31.31~24.04.1, 7.0.0-1006.7, 7.0.0-1011.11~24.04.1, 7.0.0-1012.12, 7.0.0-1012.12~24.04.1
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1011.11, 7.0.0-1014.14
linux-gcp-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-oracle-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1013.13
linux-azure-7.0 (Ubuntu package) - update to 7.0.0-1014.14~24.04.1

• https://git.kernel.org/stable/c/232e4b313ea342672edf8947e067c0de4328405b
• https://git.kernel.org/stable/c/353d9578951dd38bc9679308f5b618ceed1f20fa
• https://git.kernel.org/stable/c/455bc12e7b73ab5a2dfcb47822e91e772bc6c42e
• https://git.kernel.org/stable/c/6df7e16d4f742c80add58995a6e69385b97aa9e6
• https://git.kernel.org/stable/c/7d8bf3d8f91073f4db347ed3aa6302b56107499c
• https://git.kernel.org/stable/c/b28b12be6e8910489e6800ed93ea4d41dfe19683
• https://git.kernel.org/stable/c/cd923dadefadb9671b5ac341b672ff424d429c39
• https://git.kernel.org/stable/c/f0f5a1d7056980a0d512456fdb370cfb72bba86a
• https://git.kernel.org/stable/c/f965cf22dda7f512f4922415894c3e528269a4ae

• NULL pointer dereference in Linux kernel test-drivers vidtv driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-oracle-7.0
• Ubuntu update for linux-azure
• Ubuntu update for linux-azure-7.0