High severity · published Mar 26, 2026
CVE-2026-4652
Remote denial of service via null pointer dereference
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeBSD · FreeBSD
15.0-RELEASE before p5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4652
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4652
Vendor Advisory
https://security.freebsd.org/advisories/FreeBSD-SA-26:07.nvmf.asc
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