CVE-2022-23303: The implementations of SAE in hostapd before 2.10 and wpa_supplicant before 2.10 are vulnerable to side channe

Q: How do I fix CVE-2022-23303?

hostapd: upgrade to 2.10; wpa supplicant: upgrade to 2.10; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2022-23303 being exploited?

CVE-2022-23303 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-23303 affect?

CVE-2022-23303 affects hostapd, wpa supplicant, fedora. Severity is critical (CVSS 9.8). 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.

Q: How urgent is CVE-2022-23303?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADEUPGRADEMITIGATE

CVE-2022-23303 is a critical-severity flaw (CVSS 9.8) affecting hostapd, wpa supplicant, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Weakness	CWE-203
Published	2022-01-17
Last modified	2026-07-14

Publisher (CNA): MITRE · Vendor: fedoraproject · w1.fi

Last updated 2026-07-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-01-17 02:15 UTCPublished CVE record published
2026-07-14 12:16 UTCUpdated Record last modified

w1.fi hostapd UPGRADE

Affected: < 2.10

Fixed in: 2.10

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy hostapd || rpm -q hostapd || hostapd --version

2. UPGRADE to 2.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade hostapd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hostapd

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

w1.fi wpa supplicant UPGRADE

Affected: < 2.10

Fixed in: 2.10

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy wpa-supplicant || rpm -q wpa-supplicant || wpa-supplicant --version

2. UPGRADE to 2.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wpa-supplicant

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wpa-supplicant

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

fedoraproject fedora MITIGATE

Affected: 35

Fixed in: no fixed release known

Safe to downgrade to: a release before 35

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-23303?

hostapd: upgrade to 2.10; wpa supplicant: upgrade to 2.10; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-23303 being exploited?

CVE-2022-23303 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-23303 affect?

CVE-2022-23303 affects hostapd, wpa supplicant, fedora. Severity is critical (CVSS 9.8). 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 urgent is CVE-2022-23303?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-58374 MEDIUM 6.5 UPGRADE In hostapd before 2.12, a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) Multi-Link Operation (MLO) a
CVE-2022-37660 MEDIUM 6.5 UPGRADE In hostapd 2.10 and earlier, the PKEX code remains active even after a successful PKEX association
CVE-2022-23304 CRITICAL 9.8 UPGRADE UPGRADE The implementations of EAP-pwd in hostapd before 2.10 and wpa_supplicant before 2.10 are vulnerable to side-ch
CVE-2021-30004 MEDIUM 5.3 DOWNGRADE DOWNGRADE In wpa_supplicant and hostapd 2.9, forging attacks may occur because AlgorithmIdentifier parameters are mishan
CVE-2025-24912 LOW 3.7 UPGRADE hostapd fails to process crafted RADIUS packets properly

References

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