tcpflow has TIM Element OOB Write in wifipcap_CVE-2026-25061

5.5 / 10

MEDIUM

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

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.

Basic Information

ID CVE-2026-25061

Source GitHub_M

Published Jan 29, 2026 at 21:42

Affected Product

Vendor simsong

Product tcpflow

Version <= 1.61

Affected Versions simsong tcpflow <= 1.61

CWE Classification

CWE-787

References

github.com /simsong/tcpflow/security/advisories/GHSA-q5q6-frrv-9rj6

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    "published": "2026-01-29T21:42:47.013Z",
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