CVE-2024-46692

Kernel hang via non-atomic SMC call

Published Sep 13, 2024 · Updated May 11, 2026

Improper locking in the Qualcomm SCM firmware driver in Linux allows local users to hang kernel threads during concurrent SMC calls. get_wq_ctx() is configured as a sleepable standard call, so an interruption can make it sleep while another SMC waits for a wait-queue context, causing deadlock. Exploitation requires local low-privileged access, concurrent sleeping SMC requests, and a platform using the Qualcomm SCM path; the reported consequence is loss of availability.

CVSS severity5.5
Medium
EPSS probability0.17%
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 the Qualcomm SCM firmware driver in Linux allows local users to hang kernel threads during concurrent SMC calls. get_wq_ctx() is configured as a sleepable standard call, so an interruption can make it sleep while another SMC waits for a wait-queue context, causing deadlock. Exploitation requires local low-privileged access, concurrent sleeping SMC requests, and a platform using the Qualcomm SCM path; the reported consequence is loss of availability.

The record

CVE
CVE-2024-46692
Published
Sep 13, 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. Sep 13, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.3
  2. Affected versionversion=6bf32599223634294cdc6efb359ffaab1d68073c <9960085a3a82c58d3323c1c20b991db6045063b0
  3. Affected versionversion=6bf32599223634294cdc6efb359ffaab1d68073c <cdf7efe4b02aa93813db0bf1ca596ad298ab6b06
  4. Affected versionversion=6bf32599223634294cdc6efb359ffaab1d68073c <e40115c33c0d79c940545b6b12112aace7acd9f5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.3; version=6bf32599223634294cdc6efb359ffaab1d68073c <9960085a3a82c58d3323c1c20b991db6045063b0; version=6bf32599223634294cdc6efb359ffaab1d68073c <cdf7efe4b02aa93813db0bf1ca596ad298ab6b06; version=6bf32599223634294cdc6efb359ffaab1d68073c <e40115c33c0d79c940545b6b12112aace7acd9f5

Published CVSS scores

5.5NISTCVSS: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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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.

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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