CVE-2026-4652 Remote denial of service via null pointer dereference
Remote attackers can cause a kernel panic and denial of service on FreeBSD systems by sending malformed NVMe/TCP CONNECT commands.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4652?
CVE-2026-4652 is a high-severity vulnerability in Freebsd Freebsd, published on 26 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On a system exposing an NVMe/TCP target, a remote client can trigger a kernel panic by sending a CONNECT command for an I/O queue with a bogus or stale CNTLID.
An attacker with network access to the NVMe/TCP target can trigger an unauthenticated Denial of Service condition on the affected machine.
Weakness: CWE-476
Which versions are affected by CVE-2026-4652?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2026-4652?
No fix has been published for CVE-2026-4652 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-4652 being exploited?
There is no known exploitation of CVE-2026-4652 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-wr95-7j53-j5c2.