CVE-2026-58374: In hostapd before 2.12, a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) Multi-Link Operation (MLO) a

Q: How do I fix CVE-2026-58374?

hostapd: upgrade to newer than 2.11. Exact commands for each OS are on this page.

Q: Is CVE-2026-58374 being exploited?

CVE-2026-58374 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-2026-58374 affect?

CVE-2026-58374 affects hostapd. Severity is medium (CVSS 6.5). In hostapd before 2.12, a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) Multi-Link Operation (MLO) association request processing allows an unauthenticated attacker within wireless range to send a crafted management frame containi

Q: How urgent is CVE-2026-58374?

Priority 28/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2026-58374 is a medium-severity flaw (CVSS 6.5) affecting hostapd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In hostapd before 2.12, a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) Multi-Link Operation (MLO) association request processing allows an unauthenticated attacker within wireless range to send a crafted management frame containing a malformed Multi-Link Element or Per-STA Profile subelement. In hostapd_process_ml_assoc_req() in src/ap/ieee802_11_eht.c, the received link_id field can be parsed as value 15, but the corresponding links[]

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-193
Published	2026-06-30
Last modified	2026-10-25

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

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-30 13:19 UTCPublished CVE record published
2026-10-25 21:10 UTCUpdated Record last modified

w1.fi hostapd UPGRADE

Affected: <= 2.11

Fixed in: newer than 2.11

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.11 (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.

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-2026-58374?

hostapd: upgrade to newer than 2.11. Exact commands for each OS are on this page.

Is CVE-2026-58374 being exploited?

CVE-2026-58374 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-2026-58374 affect?

CVE-2026-58374 affects hostapd. Severity is medium (CVSS 6.5). In hostapd before 2.12, a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) Multi-Link Operation (MLO) association request processing allows an unauthenticated attacker within wireless range to send a crafted management frame containi

How urgent is CVE-2026-58374?

Priority 28/100. No elevated risk signals yet.

Software pages

Wi-Fi vulnerabilities

References

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