CVE-2019-16275

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.

Published: 2019-09-12 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-16275 is rated Moderate Risk (50.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.63%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-16275

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-30 0.50% 0.63% +0.12%
2 2026-02-18 0.57% 0.50% -0.07%
3 2026-01-20 — 0.57% —

Full EPSS history (28 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-16275

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
3.3 2.0 LOW
AV:A/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 6.5 2.9 [email protected]

Weakness enumeration for CVE-2019-16275

OS Trackers for CVE-2019-16275

vendor priority summary link
alpine medium CVE-2019-16275: 2 source package rows (hostapd, wpa_supplicant); 87 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 57, open 30. https://security.alpinelinux.org/vuln/CVE-2019-16275
debian not yet assigned CVE-2019-16275 not yet assigned priority: Debian including 1 source packages (wpa), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-16275
redhat medium — https://access.redhat.com/security/cve/CVE-2019-16275
suse medium CVE-2019-16275 severity moderate: SUSE including 26 source package names (hostapd-2.9-6.2, hostapd-2.9-bp152.2.3.1, …), 79 product×package rows across 73 product lines (Container rancher/elemental-teal-rt/5.3, Container rancher/elemental-teal-rt/5.4, … (73 product lines)): Fixed 77, Known Not Affected 2. https://www.suse.com/security/cve/CVE-2019-16275/
ubuntu medium CVE-2019-16275 medium priority: Ubuntu including 2 source packages (wpa, wpasupplicant), 10 status rows across 5 suites (bionic, disco, trusty, upstream, xenial): DNE 4, released 4, needs-triage 2. https://ubuntu.com/security/CVE-2019-16275

Affected software / configurations for CVE-2019-16275

Vendor Product Version Raw CPE
w1.fi hostapd <= 2.9 cpe:2.3:a:w1.fi:hostapd:*:*:*:*:*:*:*:*
w1.fi wpa_supplicant <= 2.9 cpe:2.3:a:w1.fi:wpa_supplicant:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 19.04 cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*

References for CVE-2019-16275

URL Tags
http://www.openwall.com/lists/oss-security/2019/09/12/6 Mailing List Mitigation Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/09/msg00017.html Mailing List Third Party Advisory
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 Mailing List Third Party Advisory
https://usn.ubuntu.com/4136-1/ Third Party Advisory
https://usn.ubuntu.com/4136-2/ Third Party Advisory
https://w1.fi/security/2019-7/ Patch Vendor Advisory
https://w1.fi/security/2019-7/ap-mode-pmf-disconnection-protection-bypass.txt Mitigation Vendor Advisory
https://www.debian.org/security/2019/dsa-4538 Third Party Advisory
https://www.openwall.com/lists/oss-security/2019/09/11/7 Mailing List Mitigation Third Party Advisory
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