CVE-2026-25061 tcpflow has TIM Element OOB Write in wifipcap

What is CVE-2026-25061?

CVE-2026-25061 is a medium-severity vulnerability in Debian Debian Linux, published on 29 Jan 2026.

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.

Weakness: CWE-787

Which versions are affected by CVE-2026-25061?

It affects 2 products.

Products include Debian Debian Linux, Digitalcorpora Tcpflow.

How do I fix CVE-2026-25061?

Upgrade to a fixed version.

Is CVE-2026-25061 being exploited?

There is no known exploitation of CVE-2026-25061 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-25061, DLA-4478-1, GHSA-q5q6-frrv-9rj6, MGASA-2026-0113, UBUNTU-CVE-2026-25061.