Out-of-bounds write in tcpflow - CVE-2026-25061
Published: April 25, 2026
Vulnerability identifier: #VU127928
CSH Severity: Medium
CVSS v4.0: 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:U/U:Green
CVE-ID: CVE-2026-25061
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Simson L. Garfinkel
Affected software:
tcpflow
tcpflow
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds write in WifiPacket::parse_elements() in src/wifipcap/wifipcap.cpp when parsing a crafted 802.11 management frame TIM element. A remote attacker can send a specially crafted frame to cause a denial of service.
The affected structure is stack-allocated in handle_beacon() and related handlers, and the overwrite can write 1 byte past tim.bitmap[251].
How to mitigate CVE-2026-25061
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.