SB20260320112 - Buffer over-read in Linux kernel sched
Published: March 20, 2026
Security Bulletin ID
SB20260320112
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Buffer over-read (CVE-ID: CVE-2026-23245)
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper memory management in the net/sched: act_gate component when handling action replacement while the hrtimer callback or dump path is walking the schedule list. A local user can trigger a race condition to cause a denial of service.
Exploitation requires access to the network scheduling subsystem and occurs due to lack of proper synchronization during parameter updates.
Remediation
Install update from vendor's website.