SB20260928409 - Incorrect calculation in Linux kernel mptcp
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928409
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect calculation (CVE-ID: CVE-2026-97522)
CWE-ID: CWE-682 - Incorrect Calculation
CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause incorrect byte accounting.
The vulnerability exists due to improper accounting in __mptcp_subflow_push_pending() when __subflow_push_pending() returns an error. A local user can trigger an error during a pending subflow push to cause incorrect byte accounting.
Remediation
Install update from vendor's website.