NULL pointer dereference in FreeBSD

CVE-2026-4652

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-4652: held from 0.004 to 0.005.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Affected products

  • FreeBSD — versions 15.0, 15.0-RELEASE

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-4652?
CVE-2026-4652 is a high-severity vulnerability in FreeBSD, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-03-26.
How severe is CVE-2026-4652?
High severity. CVSS v3 base score is 7.5 out of 10.