NULL pointer dereference in FreeBSD - CVE-2026-4652
Published: March 30, 2026
Vulnerability identifier: #VU124682
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-4652
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeBSD Foundation
Affected software:
FreeBSD
FreeBSD
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the nvmf driver when handling CONNECT commands for I/O queues with a bogus or stale CNTLID. A remote attacker can send a specially crafted CONNECT command to cause a kernel panic.
How to mitigate CVE-2026-4652
Install security update from vendor's website.