Incorrect calculation in Linux kernel - CVE-2026-80905
Published: September 5, 2026
Vulnerability identifier: #VU147002
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80905
CWE-ID: CWE-682
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause incorrect transport-header handling.
The vulnerability exists due to incorrect header offset handling in tap_get_user_xdp() when processing VLAN-tagged frames. A local user can send a VLAN-tagged frame to cause incorrect transport-header handling.
Affected software
Linux kernel
How to mitigate CVE-2026-80905
Install security update from vendor's repository.