Resource exhaustion in Linux kernel - CVE-2026-23313
Published: March 25, 2026
Vulnerability identifier: #VU124540
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23313
CWE-ID: CWE-400
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 resource management in the i40e NAPI poll tracepoint when handling network packets. A local user can trigger the tracepoint to cause a preempt count leak, leading to a denial of service.
The issue arises from using get_cpu() without a corresponding put_cpu() in the tracepoint, which results in an increment of the preempt count that is never decremented.
How to mitigate CVE-2026-23313
Install security update from vendor's repository.