Advisory Published

USN-4136-2: wpa_supplicant and hostapd vulnerability

First published: Wed Sep 18 2019(Updated: )

USN-4136-1 fixed a vulnerability in wpa_supplicant. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Original advisory details: It was discovered that wpa_supplicant incorrectly handled certain management frames. An attacker could possibly use this issue to cause a denial of service.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/hostapd<1:2.1-0ubuntu1.7+esm2
1:2.1-0ubuntu1.7+esm2
Ubuntu Linux=14.04
All of
ubuntu/wpasupplicant<2.1-0ubuntu1.7+esm2
2.1-0ubuntu1.7+esm2
Ubuntu Linux=14.04
All of
ubuntu/wpasupplicant<0.7.3-6ubuntu2.5
0.7.3-6ubuntu2.5
Ubuntu Linux=12.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this wpa_supplicant and hostapd vulnerability?

    The vulnerability ID for this wpa_supplicant and hostapd vulnerability is USN-4136-2.

  • What is the affected software for this vulnerability?

    The affected software for this vulnerability includes wpa_supplicant and hostapd versions 2.1-0ubuntu1.7+esm2 and 0.7.3-6ubuntu2.5 on Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

  • What is the severity of the wpa_supplicant and hostapd vulnerability?

    The severity of the wpa_supplicant and hostapd vulnerability is not mentioned in the provided information. It is recommended to refer to the official references for more details.

  • How can I fix the wpa_supplicant and hostapd vulnerability?

    To fix the wpa_supplicant and hostapd vulnerability, update to the latest available versions of wpa_supplicant and hostapd as recommended by the official references.

  • Where can I find more information about the wpa_supplicant and hostapd vulnerability?

    More information about the wpa_supplicant and hostapd vulnerability can be found in the official references: CVE-2019-16275, USN-4136-1, and the Launchpad page for wpa 2.1-0ubuntu1.7+esm2.

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