SB2026091236 - Always-Incorrect Control Flow Implementation in Linux kernel trace
Published: September 12, 2026
Security Bulletin ID
SB2026091236
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) Always-Incorrect Control Flow Implementation (CVE-ID: CVE-2026-89748)
CWE-ID: CWE-670 - Always-Incorrect Control Flow Implementation
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 corrupt ring buffer data.
The vulnerability exists due to incorrect retry exhaustion handling in simple_ring_buffer_swap_reader_page() when retrying link replacement during a simple ring buffer reader page swap. A local user can trigger the affected reader page swap operation to corrupt ring buffer data.
Remediation
Install update from vendor's website.