How severe is CVE-2022-23303?

CVE-2022-23303 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-23303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-23303?

CVE-2022-23303 primarily affects W1.fi Hostapd. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-23303?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2022-23303 published?

CVE-2022-23303 was published on 2022-01-17 and last updated on 2026-06-17.

CVE-2022-23303

CVE-2022-23303 is a critical-severity vulnerability in W1.fi Hostapd with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-203.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 6.8
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: W1.fi Hostapd
Published: 2022-01-17
Last modified: 2026-06-17

Description

The implementations of SAE in hostapd before 2.10 and wpa_supplicant before 2.10 are vulnerable to side channel attacks as a result of cache access patterns. NOTE: this issue exists because of an incomplete fix for CVE-2019-9494.

Frequently asked questions

What is CVE-2022-23303?: The implementations of SAE in hostapd before 2.10 and wpa_supplicant before 2.10 are vulnerable to side channel attacks as a result of cache access patterns. NOTE: this issue exists because of an incomplete fix for CVE-2019-9494.
How severe is CVE-2022-23303?: CVE-2022-23303 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-23303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-23303?: CVE-2022-23303 primarily affects W1.fi Hostapd. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-23303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-23303 published?: CVE-2022-23303 was published on 2022-01-17 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:w1.fi:hostapd:*:*:*:*:*:*:*:*
cpe:2.3:a:w1.fi:wpa_supplicant:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

More vulnerabilities in W1.fi Hostapd

CVE-2022-23304 — Critical (CVSS 9.8): The implementations of EAP-pwd in hostapd before 2.10 and wpa_supplicant before 2.10 are vulnerable to side-channel…
CVE-2019-9499 — High (CVSS 8.1): The implementations of EAP-PWD in wpa_supplicant EAP Peer, when built against a crypto library missing explicit…
CVE-2019-9498 — High (CVSS 8.1): The implementations of EAP-PWD in hostapd EAP Server, when built against a crypto library missing explicit validation…
CVE-2019-9497 — High (CVSS 8.1): The implementations of EAP-PWD in hostapd EAP Server and wpa_supplicant EAP Peer do not validate the scalar and element…
CVE-2017-13082 — High (CVSS 8.1): Wi-Fi Protected Access (WPA and WPA2) that supports IEEE 802.11r allows reinstallation of the Pairwise Transient Key…
CVE-2020-12695 — High (CVSS 7.5): The Open Connectivity Foundation UPnP specification before 2020-04-17 does not forbid the acceptance of a subscription…

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CVE-2024-25191 — Critical (CVSS 9.8): php-jwt 1.0.0 uses strcmp (which is not constant time) to verify authentication, which makes it easier to bypass…
CVE-2024-25190 — Critical (CVSS 9.8): l8w8jwt 2.2.1 uses memcmp (which is not constant time) to verify authentication, which makes it easier to bypass…

Browse all CWE-203 (Observable Discrepancy) vulnerabilities →