Buffer overflow in Digitalcorpora Tcpflow
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (45.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000
Affected products
- Digitalcorpora Tcpflow
- Simsong Tcpflow — versions <= 1.61
- Debian Linux — versions 11.0
Weakness classification (CWE)
References
- github.com/simsong/tcpflow/security/advisories/GHSA-q5q6-frrv-9rj6 (Exploit, Mitigation, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-25061?
- CVE-2026-25061 is a high-severity vulnerability in Digitalcorpora Tcpflow, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-01-29.
- How severe is CVE-2026-25061?
- High severity. CVSS v3 base score is 7.5 out of 10.