CVE-2025-21782Public exploit

Kernel memory disclosure via unterminated OrangeFS debug buffer

Published Feb 27, 2025 · Updated May 11, 2026

Out-of-bounds read in affected Linux kernels allows local users to disclose kernel memory or crash through the OrangeFS debugfs interface. orangefs_debug_write capped oversized input one byte beyond its buffer size, allowing a full-buffer copy to erase the terminating null before strlen processed the data. The trigger requires root access to /sys/kernel/debugfs/orangefs/kernel-debug, and no integrity impact is reported.

CVSS severity7.1
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in affected Linux kernels allows local users to disclose kernel memory or crash through the OrangeFS debugfs interface. orangefs_debug_write capped oversized input one byte beyond its buffer size, allowing a full-buffer copy to erase the terminating null before strlen processed the data. The trigger requires root access to /sys/kernel/debugfs/orangefs/kernel-debug, and no integrity impact is reported.

The record

CVE
CVE-2025-21782
Published
Feb 27, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 27, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.6
  2. Affected versionversion=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <09d472a18c0ee1d5b83612cb919e33a1610fea16
  3. Affected versionversion=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <18b7f841109f697840fe8633cf7ed7d32bd3f91b
  4. Affected versionversion=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <1c5244299241cf49d8ae7b5054e299cc8faa4e09
  5. Affected versionversion=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <1da2697307dad281dd690a19441b5ca4af92d786
  6. Affected versionversion=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <2b84a231910cef2e0a16d29294afabfb69112087
  7. Affected versionversion=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <8725882b0f691f8113b230aea9df0256030a63a6
  8. Affected versionversion=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <897f496b946fdcfab5983c983e4b513ab6682364
  9. Affected versionversion=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <f7c848431632598ff9bce57a659db6af60d75b39

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <09d472a18c0ee1d5b83612cb919e33a1610fea16; version=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <18b7f841109f697840fe8633cf7ed7d32bd3f91b; version=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <1c5244299241cf49d8ae7b5054e299cc8faa4e09; version=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <1da2697307dad281dd690a19441b5ca4af92d786; version=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <2b84a231910cef2e0a16d29294afabfb69112087; version=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <8725882b0f691f8113b230aea9df0256030a63a6; version=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <897f496b946fdcfab5983c983e4b513ab6682364; version=f7ab093f74bf638ed98fd1115f3efa17e308bb7f <f7c848431632598ff9bce57a659db6af60d75b39

Published CVSS scores

7.1NIST NVDCVSS: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

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

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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