CVE-2025-68380

Wi-Fi firmware crash via swapped HE MCS fields

Published Dec 24, 2025 · Updated Dec 24, 2025

Incorrect HE MCS handling in Linux kernels from 5.16 allows physically proximate attackers to crash ath11k firmware via a rogue AP. ath11k_wmi_send_peer_assoc_cmd() reverses the peer transmit and receive MCS maps, placing an unsupported 0xffff transmit map in he_mcs->rx_mcs_set. Exploitation requires an ath11k device to associate with an access point advertising the crafted 160 MHz map; the bounded consequence is a Wi-Fi firmware crash.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect HE MCS handling in Linux kernels from 5.16 allows physically proximate attackers to crash ath11k firmware via a rogue AP. ath11k_wmi_send_peer_assoc_cmd() reverses the peer transmit and receive MCS maps, placing an unsupported 0xffff transmit map in he_mcs->rx_mcs_set. Exploitation requires an ath11k device to associate with an access point advertising the crafted 160 MHz map; the bounded consequence is a Wi-Fi firmware crash.

The record

CVE
CVE-2025-68380
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.16
  2. Affected versionversion=61fe43e7216df6e9a912d831aafc7142fa20f280 <097c870b91817779e5a312c6539099a884b1fe2b
  3. Affected versionversion=61fe43e7216df6e9a912d831aafc7142fa20f280 <381096a417b7019896e93e86f4c585c592bf98e2
  4. Affected versionversion=61fe43e7216df6e9a912d831aafc7142fa20f280 <4a013ca2d490c73c40588d62712ffaa432046a04
  5. Affected versionversion=61fe43e7216df6e9a912d831aafc7142fa20f280 <6b1a0da75932353f66e710976ca85a7131f647ff

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=61fe43e7216df6e9a912d831aafc7142fa20f280 <097c870b91817779e5a312c6539099a884b1fe2b; version=61fe43e7216df6e9a912d831aafc7142fa20f280 <381096a417b7019896e93e86f4c585c592bf98e2; version=61fe43e7216df6e9a912d831aafc7142fa20f280 <4a013ca2d490c73c40588d62712ffaa432046a04; version=61fe43e7216df6e9a912d831aafc7142fa20f280 <6b1a0da75932353f66e710976ca85a7131f647ff

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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