CVE-2024-47743

Local kernel crash via NULL identifier dereference

Published Oct 21, 2024 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel allows local users to crash the system through asymmetric-key lookup. The find_asymmetric_key() path warns when all three identifier arguments are NULL but then dereferences id_2 instead of rejecting the invalid call. Exploitation requires local low-privileged access and an internal caller that supplies three NULL identifiers; the bounded consequence is a kernel oops and service interruption.

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

NULL pointer dereference in the Linux kernel allows local users to crash the system through asymmetric-key lookup. The find_asymmetric_key() path warns when all three identifier arguments are NULL but then dereferences id_2 instead of rejecting the invalid call. Exploitation requires local low-privileged access and an internal caller that supplies three NULL identifiers; the bounded consequence is a kernel oops and service interruption.

The record

CVE
CVE-2024-47743
Published
Oct 21, 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. Oct 21, 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=5.17
  2. Affected versionversion=7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 <0d3b0706ada15c333e6f9faf19590ff715e45d1e
  3. Affected versionversion=7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 <13b5b401ead95b5d8266f64904086c55b6024900
  4. Affected versionversion=7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 <3322fa8f2aa40b0b3651034cd541647a600cc6c0
  5. Affected versionversion=7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 <70fd1966c93bf3bfe3fe6d753eb3d83a76597eef
  6. Affected versionversion=7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 <a3765b497a4f5224cb2f7a6a2d3357d3066214ee

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 <0d3b0706ada15c333e6f9faf19590ff715e45d1e; version=7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 <13b5b401ead95b5d8266f64904086c55b6024900; version=7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 <3322fa8f2aa40b0b3651034cd541647a600cc6c0; version=7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 <70fd1966c93bf3bfe3fe6d753eb3d83a76597eef; version=7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 <a3765b497a4f5224cb2f7a6a2d3357d3066214ee

Published CVSS scores

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

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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