Buffer over-read in Linux kernel - CVE-2026-23245
Published: March 20, 2026
Vulnerability identifier: #VU124206
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23245
CWE-ID: CWE-126
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2026-23245
Install security update from vendor's repository.