CVE-2024-56691

Local denial of service via IRQ misrouting

Published Dec 28, 2024 · Updated May 11, 2026

Incorrect IRQ-domain handling in Linux kernels beginning with 4.9 allows local users to cause a denial of service on supported hardware. The MFD parent creates Whiskey Cove USB Type-C children without the charger IRQ domain, so platform_get_irq() receives IRQ 0 instead of a mapped Linux vIRQ. Reachability requires the Intel BXT Whiskey Cove PMIC USB Type-C driver; public sources do not identify the user action that triggers failure.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect IRQ-domain handling in Linux kernels beginning with 4.9 allows local users to cause a denial of service on supported hardware. The MFD parent creates Whiskey Cove USB Type-C children without the charger IRQ domain, so platform_get_irq() receives IRQ 0 instead of a mapped Linux vIRQ. Reachability requires the Intel BXT Whiskey Cove PMIC USB Type-C driver; public sources do not identify the user action that triggers failure.

The record

CVE
CVE-2024-56691
Published
Dec 28, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 28, 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=4.9
  2. Affected versionversion=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <0997e77c51330c2866a4f39480e762cca92ad953
  3. Affected versionversion=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <0b648968bfa4f5c9c4983bca9f2de17626ed6fb6
  4. Affected versionversion=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <23230ac3c5ca3f154b64849d1cf50583b4e6b98c
  5. Affected versionversion=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <518e414d24e7037d6cc7198e942bf47fe6f5e8e1
  6. Affected versionversion=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <686fb77712a4bc94b76a0c5ae74c60118b7a0d79
  7. Affected versionversion=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <87a07a5b0b296e489c606ca95ffc16c18821975b
  8. Affected versionversion=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <c310e6916c0b297011d0fec03f168a6b24e9e984
  9. Affected versionversion=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <e1ef62e8d262e3f27446d26742208c1c81e9ee18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.9; version=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <0997e77c51330c2866a4f39480e762cca92ad953; version=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <0b648968bfa4f5c9c4983bca9f2de17626ed6fb6; version=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <23230ac3c5ca3f154b64849d1cf50583b4e6b98c; version=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <518e414d24e7037d6cc7198e942bf47fe6f5e8e1; version=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <686fb77712a4bc94b76a0c5ae74c60118b7a0d79; version=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <87a07a5b0b296e489c606ca95ffc16c18821975b; version=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <c310e6916c0b297011d0fec03f168a6b24e9e984; version=9c6235c8633210cc2da0882e2e9d6ff90aa37503 <e1ef62e8d262e3f27446d26742208c1c81e9ee18

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 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

No sourced classifications are available.

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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