NULL pointer dereference in Linux kernel - CVE-2026-64147

Vulnerability identifier: #VU138484

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-2026-64147

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 improper handling of error pointers and a missing reference release in pds_core debugfs handling when performing firmware reset recovery or checking for an existing debugfs entry. A local user can trigger the vulnerable code path to cause a denial of service.

The crash condition occurs when CONFIG_DEBUG_FS is disabled.

Linux kernel
Ubuntu
linux-ibm (Ubuntu package)
linux-azure (Ubuntu package)
linux-aws (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-bos (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-ibm (Ubuntu package) - addressed in versions 7.0.0-1008.8, 7.0.0-1010.10
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1010.10
linux-aws (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1015.15
linux-nvidia (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1016.16~24.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2016.16

• https://git.kernel.org/stable/c/26e19622c485e53c3fdb299e822068a0542ddf0c
• https://git.kernel.org/stable/c/60ef1675b652e912f3eb064767af4432393291fd
• https://git.kernel.org/stable/c/91d13e92b983e6c6d7631012c2e20ae8057de9f2
• https://git.kernel.org/stable/c/d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32
• https://git.kernel.org/stable/c/dc416e32baaeb620b9809e9e25fc7b30889686e9

• NULL pointer dereference in Linux kernel amd pds_core driver
• Ubuntu update for linux-ibm
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws
• Ubuntu update for linux-nvidia-bos
• Ubuntu update for linux-nvidia