Resource exhaustion in Linux kernel - CVE-2026-23244
Published: March 20, 2026
Vulnerability identifier: #VU124205
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-2026-23244
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 input validation in the nvme_pr_read_keys() function when processing a user-provided num_keys value. A local user can send a specially crafted request with a large num_keys value to cause excessive memory allocation attempts, leading to a denial of service.
Exploitation requires local system access and the ability to invoke NVMe ioctl commands. No authentication beyond standard system access is required.
How to mitigate CVE-2026-23244
Install security update from vendor's repository.