CVE details
CVE-2026-25061
tcpflow is a TCP/IP packet demultiplexer. In versions up to and including 1.61, wifipcap parses 802.11 management frame elements and performs a length check on the wrong field when handling the TIM element. A crafted frame with a large TIM length can cause a 1-byte out-of-bounds write past `tim.bitmap[251]`. The overflow is small and DoS is the likely impact; code execution is potential, but still up in the air. The affected structure is stack-allocated in `handle_beacon()` and related handlers. As of time of publication, no known patches are available.
Affected ports (1)
| Port | Package | Version | Status | Maintainer |
|---|---|---|---|---|
| net/tcpflow | tcpflow | 1.6.1_1 | unaddressed | antoine@FreeBSD.org |
Template for a VuXML entry
Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.
<vuln vid="FIXME (make newentry)">
<topic>FIXME -- FIXME</topic>
<affects>
<package>
<name>tcpflow</name>
<range><lt>FIXME</lt></range>
</package>
</affects>
<description>
<body xmlns="http://www.w3.org/1999/xhtml">
<p>tcpflow is a TCP/IP packet demultiplexer. In versions up to and
including 1.61, wifipcap parses 802.11 management frame elements and
performs a length check on the wrong field when handling the TIM
element. A crafted frame with a large TIM length can cause a 1-byte
out-of-bounds write past `tim.bitmap[251]`. The overflow is small and
DoS is the likely impact; code execution is potential, but still up in
the air. The affected structure is stack-allocated in
`handle_beacon()` and related handlers. As of time of publication, no
known patches are available.</p>
</body>
</description>
<references>
<cvename>CVE-2026-25061</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2026-25061</url>
</references>
<dates>
<discovery>2026-01-29</discovery>
<entry>2026-10-25</entry>
</dates>
</vuln>