#VU115424 NULL pointer dereference in Linux kernel - CVE-2023-53240
Published: September 16, 2025 / Updated: September 22, 2025
Vulnerability identifier: #VU115424
Vulnerability risk: Low
CVSSv4.0: 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-2023-53240
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the xsk_build_skb(), xsk_generic_xmit(), xsk_no_wakeup(), __xsk_sendmsg(), __xsk_recvmsg() and xsk_poll() functions in net/xdp/xsk.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.