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.

• CWE-787

• https://github.com/simsong/tcpflow/security/advisories/GHSA-q5q6-frrv-9rj6Exploit, Mitigation, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2026/02/msg00014.htmlMailing List, Third Party Advisory

Published

Jan 29, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

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