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.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-4398680e1a advisory.

    The update fixes CVS-2026-25061

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-2f6fa1b6a1 advisory.

    The update fixes CVS-2026-25061

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4478 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4478-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Paride Legovini     February 10, 2026                             https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : tcpflow     Version        : 1.5.2+repack1-1+deb11u1     CVE ID         : CVE-2026-25061     Debian Bug     : #1126695

    A bug has been found in the tcpflow package: a wrong length check in the     802.11 management frame parser allows a crafted frame with a large TIM     length to cause an out-of-bounds write, resulting in a DoS and potentially     in code execution.

    For Debian 11 bullseye, this problem has been fixed in version     1.5.2+repack1-1+deb11u1.

    We recommend that you upgrade your tcpflow packages.

    For the detailed security status of tcpflow please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/tcpflow

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-25061)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
305016	Fedora 43 : tcpflow (2026-4398680e1a)	Nessus	Fedora Local Security Checks	medium
305008	Fedora 42 : tcpflow (2026-2f6fa1b6a1)	Nessus	Fedora Local Security Checks	medium
298570	Debian dla-4478 : tcpflow - security update	Nessus	Debian Local Security Checks	medium
297265	Linux Distros Unpatched Vulnerability : CVE-2026-25061	Nessus	Misc.	medium

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CVE-2026-25061

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