CVE-2026-53156

Kernel-memory access via post-release nvmem dereference

Published Jun 25, 2026 · Updated Jun 25, 2026

Use-after-free in the Linux Kernel nvmem core allows local users to trigger invalid access to released kernel memory through error paths. Several paths call __nvmem_device_put(), which can free the device and related resources, before continuing to dereference the same nvmem structure. Reachability requires low-privileged local access and an nvmem operation that enters affected error handling; no proven outcome beyond unsafe post-release access is public.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux Kernel nvmem core allows local users to trigger invalid access to released kernel memory through error paths. Several paths call __nvmem_device_put(), which can free the device and related resources, before continuing to dereference the same nvmem structure. Reachability requires low-privileged local access and an nvmem operation that enters affected error handling; no proven outcome beyond unsafe post-release access is public.

The record

CVE
CVE-2026-53156
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 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=4.20
  2. Affected versionversion=e888d445ac33a5b0288d670ecd970908b13f07cd <40e2a459c0dd1333b2343831480a0ad80dc07614
  3. Affected versionversion=e888d445ac33a5b0288d670ecd970908b13f07cd <5b6b6fc491899d583eaa75344e094796ae9b530b
  4. Affected versionversion=e888d445ac33a5b0288d670ecd970908b13f07cd <cb85ef5a227b3662b88f4d849a1aad43bfe7f5ae
  5. Affected versionversion=e888d445ac33a5b0288d670ecd970908b13f07cd <e0d38bf47a72da2f02c9fa6f752cd66d977cd7f7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.20; version=e888d445ac33a5b0288d670ecd970908b13f07cd <40e2a459c0dd1333b2343831480a0ad80dc07614; version=e888d445ac33a5b0288d670ecd970908b13f07cd <5b6b6fc491899d583eaa75344e094796ae9b530b; version=e888d445ac33a5b0288d670ecd970908b13f07cd <cb85ef5a227b3662b88f4d849a1aad43bfe7f5ae; version=e888d445ac33a5b0288d670ecd970908b13f07cd <e0d38bf47a72da2f02c9fa6f752cd66d977cd7f7

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-416Use After Free
T1068Exploitation for Privilege Escalation

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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