CVE-2026-25061: tcpflow is a TCP/IP packet demultiplexer

Q: How do I fix CVE-2026-25061?

tcpflow: upgrade to newer than 1.6.1; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2026-25061 being exploited?

CVE-2026-25061 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-25061 affect?

CVE-2026-25061 affects tcpflow, debian linux. Severity is high (CVSS 7.5). 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

Q: How urgent is CVE-2026-25061?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

This week

HIGH 7.5REMOTEWATCHLISTUPGRADEMITIGATE

CVE-2026-25061 is a high-severity flaw (CVSS 7.5) affecting tcpflow, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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-al

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-01-29
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: debian · digitalcorpora

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-29 22:15 UTCPublished CVE record published
2026-06-17 10:24 UTCUpdated Record last modified

digitalcorpora tcpflow UPGRADE

Affected: <= 1.6.1

Fixed in: newer than 1.6.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tcpflow || rpm -q tcpflow || tcpflow --version

2. UPGRADE to newer than 1.6.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tcpflow

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tcpflow

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-25061?

tcpflow: upgrade to newer than 1.6.1; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-25061 being exploited?

CVE-2026-25061 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-25061 affect?

CVE-2026-25061 affects tcpflow, debian linux. Severity is high (CVSS 7.5). 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

How urgent is CVE-2026-25061?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

References

← Back to latest CVEs