CVE-2024-40977

Local device interruption via recovery deadlock

Published Jul 12, 2024 · Updated May 11, 2026

Improper locking in affected Linux mt7921 drivers allows local users to deadlock chip recovery and interrupt the device. During reset, reset_work holds a lock while waiting for stat_worker to park, while stat_worker waits for that same lock because the reset state is set too late. Exploitation requires local privileges and affected mt7921 hardware entering recovery; the deadlock produces hung tasks and can culminate in a reboot.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in affected Linux mt7921 drivers allows local users to deadlock chip recovery and interrupt the device. During reset, reset_work holds a lock while waiting for stat_worker to park, while stat_worker waits for that same lock because the reset state is set too late. Exploitation requires local privileges and affected mt7921 hardware entering recovery; the deadlock produces hung tasks and can culminate in a reboot.

The record

CVE
CVE-2024-40977
Published
Jul 12, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 2024CVE publishedPublication date reported by the CVE source.
  2. May 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=4.16
  2. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <0b81faa05b0b9feb3ae2d69be1d21f0d126ecb08
  3. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <85edd783f4539a994d66c4c014d5858f490b7a02
  4. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <e974dd4c22a23ec3ce579fb6d31a674ac0435da9
  5. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <ecf0b2b8a37c8464186620bef37812a117ff6366

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <0b81faa05b0b9feb3ae2d69be1d21f0d126ecb08; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <85edd783f4539a994d66c4c014d5858f490b7a02; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <e974dd4c22a23ec3ce579fb6d31a674ac0435da9; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <ecf0b2b8a37c8464186620bef37812a117ff6366

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

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No observations available

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

Weakness, pattern, technique

CWE-667Improper Locking
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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