Vulnerability in BSD

CVE-2014-7250

The TCP stack in 4.3BSD Net/2, as used in FreeBSD 5.4, NetBSD possibly 2.0, and OpenBSD possibly 3.6, does not properly implement the session timer, which allows remote attackers to cause a denial of service (resource consumption) via crafted packets.

Published 2014-12-12 · last modified 2026-06-17.

CVSS v2 metric

CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.047 (91.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.047 · newest: 0.047 · change: 0.000

Affected products

BSD — versions 4.3
FreeBSD — versions 5.4
NetBSD — versions 2.0
OpenBSD — versions 3.6

Weakness classification (CWE)

CWE-399

References

jvn.jp/en/jp/JVN07930208/index.html (Vendor Advisory, third-party-advisory)
bugs.freebsd.org/bugzilla/show_bug.cgi
jvndb.jvn.jp/jvndb/JVNDB-2014-000134 (Vendor Advisory, third-party-advisory)