CVE-2026-64165

Boot-time crash via pre-initialization memory allocation

Published Jul 19, 2026 · Updated Jul 19, 2026

NULL pointer dereference in the Linux Kernel on ARM Integrator/CP allows local users to cause a crash during device-tree boot. During intcp_init_early, syscon_regmap_lookup_by_compatible reaches of_syscon_register, which allocates memory before memory management exists and can dereference a NULL allocator pointer. The condition requires an affected ARM Integrator/CP device-tree build; the crash was reproduced with GCC 10.x, 11.x, and 13.x, while some GCC 9.x builds return -ENOMEM and skip sched_clock_register.

CVSS severity5.5
Medium
EPSS probability0.12%
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 on ARM Integrator/CP allows local users to cause a crash during device-tree boot. During intcp_init_early, syscon_regmap_lookup_by_compatible reaches of_syscon_register, which allocates memory before memory management exists and can dereference a NULL allocator pointer. The condition requires an affected ARM Integrator/CP device-tree build; the crash was reproduced with GCC 10.x, 11.x, and 13.x, while some GCC 9.x builds return -ENOMEM and skip sched_clock_register.

The record

CVE
CVE-2026-64165
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
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=4.9
  2. Affected versionversion=bdb249fce9ad44aab340be3b7a77060114f7193b <22c738fb51f2d8b23ddff5cc0ccb2dd685bb39d3
  3. Affected versionversion=bdb249fce9ad44aab340be3b7a77060114f7193b <33ad014abec90f37dade0e00560f28864187e21a
  4. Affected versionversion=bdb249fce9ad44aab340be3b7a77060114f7193b <508b1193d63b5e073a3fe103eeb785fcba2d368c
  5. Affected versionversion=bdb249fce9ad44aab340be3b7a77060114f7193b <58a112b0973f6cd6bcb8c503d1ff88be411ed0f0
  6. Affected versionversion=bdb249fce9ad44aab340be3b7a77060114f7193b <6624854554c4c2bdfed3559e5c11bb03b16e7bd1
  7. Affected versionversion=bdb249fce9ad44aab340be3b7a77060114f7193b <812103fb6da904bd03d62cf6a9826e537318ceed
  8. Affected versionversion=bdb249fce9ad44aab340be3b7a77060114f7193b <90d77b30a666049ad24df463f52e5d529c44e8cd
  9. Affected versionversion=bdb249fce9ad44aab340be3b7a77060114f7193b <e984dc22e2c24dc34d6728e338c82b1ce7862753

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.9; version=bdb249fce9ad44aab340be3b7a77060114f7193b <22c738fb51f2d8b23ddff5cc0ccb2dd685bb39d3; version=bdb249fce9ad44aab340be3b7a77060114f7193b <33ad014abec90f37dade0e00560f28864187e21a; version=bdb249fce9ad44aab340be3b7a77060114f7193b <508b1193d63b5e073a3fe103eeb785fcba2d368c; version=bdb249fce9ad44aab340be3b7a77060114f7193b <58a112b0973f6cd6bcb8c503d1ff88be411ed0f0; version=bdb249fce9ad44aab340be3b7a77060114f7193b <6624854554c4c2bdfed3559e5c11bb03b16e7bd1; version=bdb249fce9ad44aab340be3b7a77060114f7193b <812103fb6da904bd03d62cf6a9826e537318ceed; version=bdb249fce9ad44aab340be3b7a77060114f7193b <90d77b30a666049ad24df463f52e5d529c44e8cd; version=bdb249fce9ad44aab340be3b7a77060114f7193b <e984dc22e2c24dc34d6728e338c82b1ce7862753

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

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application 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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