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Fencer Vulns
high 7.5

CVE-2019-9496 json

An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps

published 2019-04-17 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-18870

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.6%
EPSS 4.6% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps when processing the SAE confirm message when in hostapd/AP mode. All version of hostapd with SAE support are vulnerable. An attacker may force the hostapd process to terminate, performing a denial of service attack. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected.

Patch / fix

  • wpa Debian 14, Debian 13, Debian 12 2:2.7+git20190128+0c1e29f-4

debian advisories DEBIAN-CVE-2019-9496

  • hostapd openSUSE Tumbleweed 2.9-6.2
  • hostapd Package Hub 15 SP1, Package Hub 15, openSUSE Leap 15.1 2.9-bp151.5.3.1

opensuse advisories openSUSE-SU-2024:10846-1openSUSE-SU-2020:0222-1

  • hostapd Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 2.8-r0
  • hostapd Alpine 3.6 2.6-r3
  • hostapd Alpine 3.7 2.6-r5
  • hostapd Alpine 3.8 2.6-r6
  • hostapd Alpine 3.9 2.7-r3

alpine advisories ALPINE-CVE-2019-9496

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-9496 updated cvss 6.5

hostapd: SAE confirm missing state validation in hostapd/AP

  • Red Hat Enterprise Linux 5 wpa_supplicant Red Hat Enterprise Linux 6 wpa_supplicant Red Hat Enterprise Linux 7 wpa_supplicant Red Hat Enterprise Linux 8 wpa_supplicant
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.63% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Wi-Fi Alliance hostapd with SAE support
  • Wi-Fi Alliance wpa_supplicant with SAE support

Classification

Weakness
  • CWE-642 External Control of Critical State Data
  • CWE-287 Improper Authentication

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.