SB2026090522 - Incorrect calculation in Linux kernel net driver
Published: September 5, 2026
Security Bulletin ID
SB2026090522
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect calculation (CVE-ID: CVE-2026-80905)
CWE-ID: CWE-682 - Incorrect Calculation
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.