Vulnerability · Published Jan 29, 2026 · Assigned by GitHub_M
CVE-2026-25061tcpflow has TIM Element OOB Write in wifipcap
Medium 5.5
In plain English
A medium-severity out-of-bounds write in tcpflow from simsong. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | tcpflow | no fix listed | DEBIAN-CVE-2026-25061 |
| Debian:13 | tcpflow | no fix listed | DEBIAN-CVE-2026-25061 |
| Debian:14 | tcpflow | no fix listed | DEBIAN-CVE-2026-25061 |
| Ubuntu:22.04:LTS | tcpflow | no fix listed | UBUNTU-CVE-2026-25061 |
| Ubuntu:24.04:LTS | tcpflow | no fix listed | UBUNTU-CVE-2026-25061 |
| Ubuntu:25.10 | tcpflow | no fix listed | UBUNTU-CVE-2026-25061 |
| Ubuntu:26.04:LTS | tcpflow | no fix listed | UBUNTU-CVE-2026-25061 |
| Ubuntu:26.10 | tcpflow | no fix listed | UBUNTU-CVE-2026-25061 |
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P