CVE-2019-16275

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-09-12 · updated 2026-06-17
Weakness: CWE-346

Description

hostapd before 2.10 and wpa_supplicant before 2.10 allow an incorrect indication of disconnection in certain situations because source address validation is mishandled. This is a denial of service that should have been prevented by PMF (aka management frame protection). The attacker must send a crafted 802.11 frame from a location that is within the 802.11 communications range.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 18.04, 19.04
Debian Linux: 8.0, 10.0
w1.fi hostapd: through 2.9
Canonical Ltd. wpa_supplicant: through 2.9

References

http://www.openwall.com/lists/oss-security/2019/09/12/6
https://lists.debian.org/debian-lts-announce/2019/09/msg00017.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36G4XAZ644DMHBLKOL4FDSPZVIGNQY6U/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B7NCLOPTZNRRNYODH22BFIDH6YIQWLJD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FEGITWRTIWABW54ANEPCEF4ARZLXGSK5/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HY6STGJIIROVNIU6VMB2WTN2Q5M65WF4/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PBJXUKV6XMSELWNXPS37CSUIH5EUHFXQ/
https://seclists.org/bugtraq/2019/Sep/56
https://usn.ubuntu.com/4136-1/
https://usn.ubuntu.com/4136-2/
https://w1.fi/security/2019-7/
https://w1.fi/security/2019-7/ap-mode-pmf-disconnection-protection-bypass.txt

Get alerted when CVE-2019-16275 or the next vulnerability affects your stack