CVE-2026-23002Hinoki check available

Kernel crash via faultable build-ID page-cache read

Published Jan 25, 2026 · Updated Jan 25, 2026

NULL pointer dereference in Linux Kernel 6.12 through 6.18.6 and 6.19 release candidates allows local users to crash the kernel. In a sleepable lib/buildid path, freader directly calls read_cache_folio() instead of the standard __kernel_read() interface, leaving filemap_read_folio() to dereference a NULL pointer while faulting file data. Reachability requires local low-privileged execution and a build-ID read that enters the sleepable, faultable path; the reported consequence is an availability-only kernel crash.

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

What happened

NULL pointer dereference in Linux Kernel 6.12 through 6.18.6 and 6.19 release candidates allows local users to crash the kernel. In a sleepable lib/buildid path, freader directly calls read_cache_folio() instead of the standard __kernel_read() interface, leaving filemap_read_folio() to dereference a NULL pointer while faulting file data. Reachability requires local low-privileged execution and a build-ID read that enters the sleepable, faultable path; the reported consequence is an availability-only kernel crash.

The record

CVE
CVE-2026-23002
Published
Jan 25, 2026
Updated
Jan 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 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=6.12
  2. Affected versionversion=ad41251c290dfe3c01472c94d2439a59de23fe97 <568aeb3476c770a3863c755dd2a199c212434286
  3. Affected versionversion=ad41251c290dfe3c01472c94d2439a59de23fe97 <777a8560fd29738350c5094d4166fe5499452409
  4. Affected versionversion=ad41251c290dfe3c01472c94d2439a59de23fe97 <b11dfb7708f212b96c7973a474014c071aa02e05

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.12; version=ad41251c290dfe3c01472c94d2439a59de23fe97 <568aeb3476c770a3863c755dd2a199c212434286; version=ad41251c290dfe3c01472c94d2439a59de23fe97 <777a8560fd29738350c5094d4166fe5499452409; version=ad41251c290dfe3c01472c94d2439a59de23fe97 <b11dfb7708f212b96c7973a474014c071aa02e05

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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