CVE-2026-53041

Kernel memory disclosure and crash via OCFS2 listxattr

Published Jun 24, 2026 · Updated Jun 24, 2026

Out-of-bounds read in Linux Kernel OCFS2 listxattr handling allows local users to disclose kernel memory or crash the system. After inline attribute names exactly consume the supplied buffer, ocfs2_xattr_list_entry() treats the zero remaining size as probe mode, skips its bounds check, counts block-stored names, and makes listxattr() copy beyond the allocated list buffer. Exploitation requires a writable OCFS2 file with both inline and block-based user attributes; network wrappers allocate the full size and do not expose the trigger.

CVSS severity7.1
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds read in Linux Kernel OCFS2 listxattr handling allows local users to disclose kernel memory or crash the system. After inline attribute names exactly consume the supplied buffer, ocfs2_xattr_list_entry() treats the zero remaining size as probe mode, skips its bounds check, counts block-stored names, and makes listxattr() copy beyond the allocated list buffer. Exploitation requires a writable OCFS2 file with both inline and block-based user attributes; network wrappers allocate the full size and do not expose the trigger.

The record

CVE
CVE-2026-53041
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=2.6.28
  2. Affected versionversion=936b8834366ec05f2a6993f73afd8348cac9718e <2323084c17370304f49c84b354fe7b3edbb264fe
  3. Affected versionversion=936b8834366ec05f2a6993f73afd8348cac9718e <2685df8577a38d83b367c8cf52eda9dc286959ff
  4. Affected versionversion=936b8834366ec05f2a6993f73afd8348cac9718e <46e66fefb83811958127bc9ad736983ec629d82b
  5. Affected versionversion=936b8834366ec05f2a6993f73afd8348cac9718e <50033ec1350fe68abdc63b950ced7ae57364b77a
  6. Affected versionversion=936b8834366ec05f2a6993f73afd8348cac9718e <6f702b00b8124c5d3525f19172934544826a114d
  7. Affected versionversion=936b8834366ec05f2a6993f73afd8348cac9718e <a35a1c2b170b5b578b1b3fecb95694796552af9a
  8. Affected versionversion=936b8834366ec05f2a6993f73afd8348cac9718e <d12f558e6200b3f47dbef9331ed6d115d2410e59
  9. Affected versionversion=936b8834366ec05f2a6993f73afd8348cac9718e <d919b905939eda93393e3572900ff70dbad2b47f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2.6.28; version=936b8834366ec05f2a6993f73afd8348cac9718e <2323084c17370304f49c84b354fe7b3edbb264fe; version=936b8834366ec05f2a6993f73afd8348cac9718e <2685df8577a38d83b367c8cf52eda9dc286959ff; version=936b8834366ec05f2a6993f73afd8348cac9718e <46e66fefb83811958127bc9ad736983ec629d82b; version=936b8834366ec05f2a6993f73afd8348cac9718e <50033ec1350fe68abdc63b950ced7ae57364b77a; version=936b8834366ec05f2a6993f73afd8348cac9718e <6f702b00b8124c5d3525f19172934544826a114d; version=936b8834366ec05f2a6993f73afd8348cac9718e <a35a1c2b170b5b578b1b3fecb95694796552af9a; version=936b8834366ec05f2a6993f73afd8348cac9718e <d12f558e6200b3f47dbef9331ed6d115d2410e59; version=936b8834366ec05f2a6993f73afd8348cac9718e <d919b905939eda93393e3572900ff70dbad2b47f

Published CVSS scores

7.1kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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-787Out-of-bounds Write
T1499Endpoint Denial of Service

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