NULL pointer dereference in FreeBSD

CVE-2025-14769

In some cases, the `tcp-setmss` handler may free the packet data and throw an error without halting the rule processing engine. A subsequent rule can then allow the traffic after the packet data is gone, resulting in a NULL pointer dereference. Maliciously crafted packets sent from a remote host may result in a Denial of Service (DoS) if the `tcp-setmss` directive is used and a subsequent rule would allow the traffic to pass.

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: 0.011 (64.3th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.3% 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-2025-14769: held from 0.011 to 0.011.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

  • FreeBSD — versions 14.3, 13.5, 14.3-RELEASE

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-14769?
CVE-2025-14769 is a high-severity vulnerability in FreeBSD, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-03-09.
How severe is CVE-2025-14769?
High severity. CVSS v3 base score is 7.5 out of 10.