CVE-2026-80944

Kernel crash via stale command buffer write

Published Sep 11, 2026 · Updated Sep 11, 2026

Use-after-free in the Linux mwifiex Wi-Fi driver allows attackers to crash the kernel through an interrupted firmware command wait. The synchronous command node retains a caller-owned stack buffer after the interrupted wait returns, and a late firmware response copies data through that stale pointer. Reachability requires the mwifiex driver, compatible Marvell Wi-Fi hardware, an in-flight firmware command, and an interrupted wait; the demonstrated consequence is stack corruption and a kernel panic.

CVSS severityUnavailable
Unscored
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux mwifiex Wi-Fi driver allows attackers to crash the kernel through an interrupted firmware command wait. The synchronous command node retains a caller-owned stack buffer after the interrupted wait returns, and a late firmware response copies data through that stale pointer. Reachability requires the mwifiex driver, compatible Marvell Wi-Fi hardware, an in-flight firmware command, and an interrupted wait; the demonstrated consequence is stack corruption and a kernel panic.

The record

CVE
CVE-2026-80944
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2026Record 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=3.15
  2. Affected versionversion=3d026d09b28dda24777129a931634949c75a9181 <20ee9c03f261bf6ac59331e2ca7b46b23646412a
  3. Affected versionversion=3d026d09b28dda24777129a931634949c75a9181 <b1bbeb8970eeb6c6bf3cd5314138103f7b69446d
  4. Affected versionversion=3d026d09b28dda24777129a931634949c75a9181 <d29a165588b6a0cf7a38db5cbd602aef7ef8c658
  5. Affected versionversion=3d026d09b28dda24777129a931634949c75a9181 <ef06882c7d8a7400b67d0d003b1008093dd589ed

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.15; version=3d026d09b28dda24777129a931634949c75a9181 <20ee9c03f261bf6ac59331e2ca7b46b23646412a; version=3d026d09b28dda24777129a931634949c75a9181 <b1bbeb8970eeb6c6bf3cd5314138103f7b69446d; version=3d026d09b28dda24777129a931634949c75a9181 <d29a165588b6a0cf7a38db5cbd602aef7ef8c658; version=3d026d09b28dda24777129a931634949c75a9181 <ef06882c7d8a7400b67d0d003b1008093dd589ed

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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