CVE-2026-25061
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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3Description
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.
Analysis
Denial-of-service attacks against tcpflow up to version 1.61 are possible via malformed 802.11 management frames that trigger a stack-based buffer overflow in TIM element parsing. An unauthenticated remote attacker can craft a specially designed wireless frame to cause a one-byte out-of-bounds write, crashing the application or potentially executing arbitrary code. …
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Remediation
Within 24 hours: Identify all systems running tcpflow versions 1.61 and earlier; disable or isolate tcpflow services if not operationally critical. Within 7 days: Implement network segmentation to restrict which systems can send 802.11 management frames to tcpflow instances; deploy additional logging and monitoring for suspicious packet patterns. …
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