CVE-2024-56634

Local kernel crash via unchecked allocation failure

Published Dec 27, 2024 · Updated May 11, 2026

NULL pointer dereference in the grgpio probe path in Linux 4.14 and later affected branches allows local users to crash the kernel. The grgpio_probe function fails to check whether devm_kasprintf returned NULL after an allocation failure and subsequently dereferences that result. Reaching the fault requires the GRGPIO driver probe and an allocation failure; the published impact is limited to loss of availability.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the grgpio probe path in Linux 4.14 and later affected branches allows local users to crash the kernel. The grgpio_probe function fails to check whether devm_kasprintf returned NULL after an allocation failure and subsequently dereferences that result. Reaching the fault requires the GRGPIO driver probe and an allocation failure; the published impact is limited to loss of availability.

The record

CVE
CVE-2024-56634
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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=4.14
  2. Affected versionversion=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <050b23d081da0f29474de043e9538c1f7a351b3b
  3. Affected versionversion=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <09adf8792b61c09ae543972a1ece1884ef773848
  4. Affected versionversion=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <4733f68e59bb7b9e3d395699abb18366954b9ba7
  5. Affected versionversion=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <53ff0caa6ad57372d426b4f48fc0f66df43a731f
  6. Affected versionversion=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <8d2ca6ac3711a4f4015d26b7cc84f325ac608edb
  7. Affected versionversion=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <ad4dfa7ea7f5f7e9a3c78627cfc749bc7005ca7a
  8. Affected versionversion=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <db2fc255fcf41f536ac8666409849e11659af88d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14; version=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <050b23d081da0f29474de043e9538c1f7a351b3b; version=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <09adf8792b61c09ae543972a1ece1884ef773848; version=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <4733f68e59bb7b9e3d395699abb18366954b9ba7; version=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <53ff0caa6ad57372d426b4f48fc0f66df43a731f; version=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <8d2ca6ac3711a4f4015d26b7cc84f325ac608edb; version=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <ad4dfa7ea7f5f7e9a3c78627cfc749bc7005ca7a; version=7eb6ce2f272336ff8337f40fa8668fa04dc2d684 <db2fc255fcf41f536ac8666409849e11659af88d

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

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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

CWE-476NULL Pointer Dereference
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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