Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-72320
Published: August 16, 2026
Vulnerability identifier: #VU143128
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-72320
CWE-ID: CWE-670
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to bypass netfilter rules.
The vulnerability exists due to improper handling of inverted lookups in nft_lookup_eval() when processing catchall elements for interval sets. A local user can trigger a crafted lookup condition to bypass netfilter rules.
The issue affects inverted lookups using catchall elements for the open-ended default range in interval sets.
Affected software
Linux kernel
How to mitigate CVE-2026-72320
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3