CVE-2026-64167

Crash-kernel boot failure via misplaced KHO metadata

Published Jul 19, 2026 · Updated Jul 19, 2026

NULL pointer dereference in Linux Kernel 6.19 through 7.0.10 and 7.1-rc1 through 7.1-rc3 allows local users to prevent crash-kernel boot. kho_fill_kimage() unconditionally writes KHO FDT and scratch metadata into crash-kernel images even when those physical areas lie outside the small reserved crash region. The failure is reached only when a locally initiated kexec crash kernel boots; kho_memory_init() passes the out-of-range FDT address to phys_to_virt(), faults, and interrupts crash recovery.

CVSS severity5.5
Medium
EPSS probability0.10%
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 Linux Kernel 6.19 through 7.0.10 and 7.1-rc1 through 7.1-rc3 allows local users to prevent crash-kernel boot. kho_fill_kimage() unconditionally writes KHO FDT and scratch metadata into crash-kernel images even when those physical areas lie outside the small reserved crash region. The failure is reached only when a locally initiated kexec crash kernel boots; kho_memory_init() passes the out-of-range FDT address to phys_to_virt(), faults, and interrupts crash recovery.

The record

CVE
CVE-2026-64167
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=6.19
  2. Affected versionversion=d7255959b69a4e727c61eb04231d11390d4f391e <a6715d7ec472a476db17787697a4abda62962284
  3. Affected versionversion=d7255959b69a4e727c61eb04231d11390d4f391e <a6ac6721326a75ff2d14c68db05f93b576d8762f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.19; version=d7255959b69a4e727c61eb04231d11390d4f391e <a6715d7ec472a476db17787697a4abda62962284; version=d7255959b69a4e727c61eb04231d11390d4f391e <a6ac6721326a75ff2d14c68db05f93b576d8762f

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-476NULL Pointer Dereference

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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