#VU124571 NULL Pointer Dereference in Linux kernel - CVE-2026-23293
Published: March 25, 2026
Vulnerability identifier: #VU124571
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-2026-23293
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 cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in the VXLAN network driver when handling packets. A local user can send a specially crafted IPv6 packet into a VXLAN interface when IPv6 is disabled at boot time to trigger a kernel NULL pointer dereference and crash the system.
Exploitation requires the ability to inject packets into the VXLAN interface, which is typically available to local users or processes with network access.
Remediation
Install security update from vendor's repository.
External links
- https://git.kernel.org/stable/c/168ff39e4758897d2eee4756977d036d52884c7e
- https://git.kernel.org/stable/c/5f93e6b4d12bd3a4517a6d447ea675f448f21434
- https://git.kernel.org/stable/c/abcd48ecdeb2e12eccb8339a35534c757782afcd
- https://git.kernel.org/stable/c/b5190fcd75a1f1785c766a8d1e44d3938e168f45
- https://git.kernel.org/stable/c/f0373e9317bc904e7bdb123d3106fe4f3cea2fb7
- https://git.kernel.org/stable/c/fbbd2118982c55fb9b0a753ae0cf7194e77149fb