Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-80612
Published: August 28, 2026
Vulnerability identifier: #VU146260
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-2026-80612
CWE-ID: CWE-670
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of skb metadata in lwtunnel encapsulation dispatch helpers when processing forwarded packets that still carry XDP metadata. A local user can send a specially crafted packet through lwtunnel encapsulation to cause a denial of service.
The issue affects RX-originated forwarded packets carrying XDP metadata and can trigger a kernel warning during BPF LWT xmit.
Affected software
Linux kernel
How to mitigate CVE-2026-80612
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3