CVE-2006-2213: Hostapd 0.3.7-2 allows remote attackers to cause a denial of service (segmentation fault) via an unspecified v

Routine

MEDIUM 5.0DOWNGRADE

CVE-2006-2213 is a medium-severity flaw (CVSS 5.0) affecting hostapd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Hostapd 0.3.7-2 allows remote attackers to cause a denial of service (segmentation fault) via an unspecified value in the key_data_length field of an EAPoL frame.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Published	2006-05-05
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: hostapd

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2006-05-05 12:46 UTCPublished CVE record published
2026-06-16 22:24 UTCUpdated Record last modified

hostapd hostapd DOWNGRADE

Affected: 0.3.7_2

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.3.7_2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.3.7_2 (Debian / Ubuntu)

apt-cache madison hostapd sudo apt install hostapd=<VERSION_BEFORE_0.3.7_2> sudo apt-mark hold hostapd

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

dnf --showduplicates list hostapd sudo dnf downgrade hostapd-<VERSION_BEFORE_0.3.7_2> sudo dnf versionlock add hostapd

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-2006-2213?

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

Is CVE-2006-2213 being exploited?

CVE-2006-2213 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-2006-2213 affect?

CVE-2006-2213 affects hostapd. Severity is medium (CVSS 5.0). Hostapd 0.3.7-2 allows remote attackers to cause a denial of service (segmentation fault) via an unspecified value in the key_data_length field of an EAPoL frame.

How urgent is CVE-2006-2213?

Priority 38/100. No elevated risk signals yet.

Related CVEs

CVE-2026-58374 MEDIUM 6.5 UPGRADE In hostapd before 2.12, a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) Multi-Link Operation (MLO) a
CVE-2022-37660 MEDIUM 6.5 UPGRADE In hostapd 2.10 and earlier, the PKEX code remains active even after a successful PKEX association
CVE-2022-23304 CRITICAL 9.8 UPGRADE UPGRADE The implementations of EAP-pwd in hostapd before 2.10 and wpa_supplicant before 2.10 are vulnerable to side-ch
CVE-2022-23303 CRITICAL 9.8 UPGRADE UPGRADE The implementations of SAE in hostapd before 2.10 and wpa_supplicant before 2.10 are vulnerable to side channe
CVE-2021-30004 MEDIUM 5.3 DOWNGRADE DOWNGRADE In wpa_supplicant and hostapd 2.9, forging attacks may occur because AlgorithmIdentifier parameters are mishan

References

← Back to latest CVEs