Improper control of a resource through its lifetime in Linux kernel - CVE-2026-64006

Vulnerability identifier: #VU138636

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-64006

CWE-ID: CWE-664

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 overlapping registers in nf_tables bitwise and byteorder operations when processing crafted nf_tables register operations. A local user can create overlapping source and destination register operations to cause incorrect packet filtering behavior and a denial of service.

Exploitation requires the ability to configure nf_tables rules.

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/18014147d3ee7831dce53fe65d7fc8d428b02552
• https://git.kernel.org/stable/c/96bea2a7baac4a1137c188dc7610184487ab30a7
• https://git.kernel.org/stable/c/a391afe74398b70107f111aa731eab608624949d
• https://git.kernel.org/stable/c/b80ef316e978de2ef81d5bee9c19800b4cf96fb8

• Improper control of a resource through its lifetime in Linux kernel netfilter
• 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