CVE-2026-29976: Buffer Overflow vulnerability in ZerBea hcxpcapngtool v

Routine

MEDIUM 6.2DOWNGRADE

CVE-2026-29976 is a medium-severity flaw (CVSS 6.2) affecting hcxtools. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer Overflow vulnerability in ZerBea hcxpcapngtool v. 7.0.1-43-g2ee308e allows a local attacker to obtain sensitive information via the getradiotapfield() function

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-120
Published	2026-03-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: zerbea

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

Am I affected?

Timeline

2026-03-26 15:16 UTCPublished CVE record published
2026-06-17 10:29 UTCUpdated Record last modified

zerbea hcxtools DOWNGRADE

Affected: 7.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 7.0.1 (Debian / Ubuntu)

apt-cache madison hcxtools sudo apt install hcxtools=<VERSION_BEFORE_7.0.1> sudo apt-mark hold hcxtools

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list hcxtools sudo dnf downgrade hcxtools-<VERSION_BEFORE_7.0.1> sudo dnf versionlock add hcxtools

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-29976?

hcxtools: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-29976 being exploited?

CVE-2026-29976 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-2026-29976 affect?

CVE-2026-29976 affects hcxtools. Severity is medium (CVSS 6.2). Buffer Overflow vulnerability in ZerBea hcxpcapngtool v. 7.0.1-43-g2ee308e allows a local attacker to obtain sensitive information via the getradiotapfield() function

How urgent is CVE-2026-29976?

Priority 29/100. Public exploit reference

References

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