CVE-2026-23007Hinoki check available

Kernel-memory disclosure via uninitialized integrity metadata

Published Jan 25, 2026 · Updated Jan 25, 2026

Information disclosure in Linux Kernel 6.11 through 6.18.6 allows local users to read uninitialized memory through block metadata. The auto-integrity write path in block/bio-integrity-auto.c leaves opaque metadata bytes uninitialized when metadata exceeds a nonzero generated PI tuple. Exposure requires a PI-capable block device with metadata larger than its PI tuple; bytes can return through userspace reads or physical storage access.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in Linux Kernel 6.11 through 6.18.6 allows local users to read uninitialized memory through block metadata. The auto-integrity write path in block/bio-integrity-auto.c leaves opaque metadata bytes uninitialized when metadata exceeds a nonzero generated PI tuple. Exposure requires a PI-capable block device with metadata larger than its PI tuple; bytes can return through userspace reads or physical storage access.

The record

CVE
CVE-2026-23007
Published
Jan 25, 2026
Updated
Jan 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-908, T1005
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.11
  2. Affected versionversion=c546d6f438338017480d105ab597292da67f6f6a <ca22c566b89164f6e670af56ecc45f47ef3df819
  3. Affected versionversion=c546d6f438338017480d105ab597292da67f6f6a <d6072557b90e0c557df319a56f4a9dc482706d2c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.11; version=c546d6f438338017480d105ab597292da67f6f6a <ca22c566b89164f6e670af56ecc45f47ef3df819; version=c546d6f438338017480d105ab597292da67f6f6a <d6072557b90e0c557df319a56f4a9dc482706d2c

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-908Use of Uninitialized Resource
T1005Data from Local System

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo