CVE-2024-26946

Kernel panic via unchecked Kprobe address dereference

Published May 1, 2024 · Updated May 11, 2026

Improper address validation in affected Linux kernel branches from 5.18 allows local users to trigger a panic through x86 Kprobes. arch_adjust_kprobe_addr() directly dereferences a caller-supplied probe address to inspect an ENDBR instruction before confirming that the address can be safely read. Reachability requires local low-privileged access and an x86 kernel built with Kprobes; the demonstrated consequence is a kernel panic, not data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper address validation in affected Linux kernel branches from 5.18 allows local users to trigger a panic through x86 Kprobes. arch_adjust_kprobe_addr() directly dereferences a caller-supplied probe address to inspect an ENDBR instruction before confirming that the address can be safely read. Reachability requires local low-privileged access and an x86 kernel built with Kprobes; the demonstrated consequence is a kernel panic, not data disclosure or modification.

The record

CVE
CVE-2024-26946
Published
May 1, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-617, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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=5.18
  2. Affected versionversion=cc66bb91457827f62e2b6cb2518666820f0a6c48 <20fdb21eabaeb8f78f8f701f56d14ea0836ec861
  3. Affected versionversion=cc66bb91457827f62e2b6cb2518666820f0a6c48 <4e51653d5d871f40f1bd5cf95cc7f2d8b33d063b
  4. Affected versionversion=cc66bb91457827f62e2b6cb2518666820f0a6c48 <6417684315087904fffe8966d27ca74398c57dd6
  5. Affected versionversion=cc66bb91457827f62e2b6cb2518666820f0a6c48 <b69f577308f1070004cafac106dd1a44099e5483
  6. Affected versionversion=cc66bb91457827f62e2b6cb2518666820f0a6c48 <f13edd1871d4fb4ab829aff629d47914e251bae3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=cc66bb91457827f62e2b6cb2518666820f0a6c48 <20fdb21eabaeb8f78f8f701f56d14ea0836ec861; version=cc66bb91457827f62e2b6cb2518666820f0a6c48 <4e51653d5d871f40f1bd5cf95cc7f2d8b33d063b; version=cc66bb91457827f62e2b6cb2518666820f0a6c48 <6417684315087904fffe8966d27ca74398c57dd6; version=cc66bb91457827f62e2b6cb2518666820f0a6c48 <b69f577308f1070004cafac106dd1a44099e5483; version=cc66bb91457827f62e2b6cb2518666820f0a6c48 <f13edd1871d4fb4ab829aff629d47914e251bae3

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.

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-617Reachable Assertion
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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