An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps
Published Apr 17, 2019
7.5
HIGHCVSS 3.0
EPSS 4.67%
Description
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.
Affected products
-
- Version 2.7StatusaffectedConstraints<=2.7
- Version
-
- Version 2.7StatusaffectedConstraints<=2.7
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Wi-Fi Alliance | hostapd with SAE support | n/a |
| ||||||
| Wi-Fi Alliance | wpa supplicant with SAE support | n/a |
|
Configuration 1
- ≤ 2.7
- ≤ 2.7
Configuration 2
- 28
- 29
- 30
No data.
Red Hat Enterprise Linux 5
wpa_supplicant
Not affected
Red Hat Enterprise Linux 6
wpa_supplicant
Not affected
Red Hat Enterprise Linux 7
wpa_supplicant
Not affected
Red Hat Enterprise Linux 8
wpa_supplicant
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | wpa_supplicant | Not affected | n/a |
| Red Hat Enterprise Linux 6 | wpa_supplicant | Not affected | n/a |
| Red Hat Enterprise Linux 7 | wpa_supplicant | Not affected | n/a |
| Red Hat Enterprise Linux 8 | wpa_supplicant | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Enterprise Linux 5, 6, and 7 do not ship hostapd and they are not affected by this flaw.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.67% (0.04669) | 91.48th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.22% (0.05224) | 91.42th | v5 (v2026.06.15) |
| May 22, 2026 | 5.16% (0.05160) | 89.99th | v4 (v2025.03.14) |
| Nov 21, 2025 | 2.16% (0.02156) | 83.73th | v4 (v2025.03.14) |
| Nov 18, 2025 | 6.78% (0.06777) | 90.39th | v4 (v2025.03.14) |
| Mar 30, 2025 | 3.12% (0.03119) | 85.66th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.94% (0.08936) | 87.50th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.79% (0.02795) | 85.16th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.12% (0.01118) | 85.23th | v3 (v2023.03.01) |
| Apr 10, 2024 | 1.12% (0.01118) | 84.34th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.74% (0.00744) | 78.71th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.54% (0.00542) | 73.83th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 16.31% (0.16306) | 92.84th | v2 (v2022.01.01) |
| Feb 3, 2022 | 10.57% (0.10570) | 87.62th | v1 |
| Jan 6, 2022 | 10.57% (0.10570) | 87.47th | v1 |
| Sep 1, 2021 | 2.57% (0.02567) | 78.88th | v1 |
| Apr 14, 2021 | 2.57% (0.02567) | 0.00th | v1 |
References (15)
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00021.html vendor-advisoryx_refsource_SUSE
- http://packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03.wpa.html x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2019-9496 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1699153 Issue Tracking
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/56OBBOJJSKRTDGEXZOVFSTP4HDSDBLAE/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVMJOFEYBGXZLFF5IOLW67SSOPKFEJP3/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TDOZGR3T7FVO5JSZWK2QPR7AOFIEJTIZ/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2019-9496
- https://seclists.org/bugtraq/2019/May/40 mailing-listx_refsource_BUGTRAQ
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc vendor-advisoryx_refsource_FREEBSD
- https://w1.fi/security/2019-3/ x_refsource_CONFIRMPatchVendor Advisory
- https://w1.fi/security/2019-3/sae-confirm-missing-state-validation.txt
- https://www.cve.org/CVERecord?id=CVE-2019-9496
- https://www.kb.cert.org/vuls/id/871675/
- https://www.synology.com/security/advisory/Synology_SA_19_16 x_refsource_CONFIRM
Change history (0)
No recorded changes yet.