SB20260720223 - Improper control of a resource through its lifetime in Linux kernel netfilter

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-64006)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• 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