CVE-2025-62230

Memory corruption via stale Xkb client resource

Published Oct 30, 2025 · Updated Oct 30, 2025

Use-after-free in the X Keyboard extension in Red Hat Enterprise Linux 6 through 10 allows local users to corrupt memory or crash the X server. XkbRemoveResourceClient() frees the device's XkbInterest data without deleting its registered resource, so client termination invokes a resource-delete callback through a dangling pointer. A low-privileged local X client must trigger Xkb resource cleanup and then disconnect; the confirmed consequences are memory corruption and display-server interruption.

CVSS severity7.3
High
EPSS probability0.26%
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 X Keyboard extension in Red Hat Enterprise Linux 6 through 10 allows local users to corrupt memory or crash the X server. XkbRemoveResourceClient() frees the device's XkbInterest data without deleting its registered resource, so client termination invokes a resource-delete callback through a dangling pointer. A low-privileged local X client must trigger Xkb resource cleanup and then disconnect; the confirmed consequences are memory corruption and display-server interruption.

The record

CVE
CVE-2025-62230
Published
Oct 30, 2025
Updated
Oct 30, 2025
Vendor
389 Directory Server
Product
Red Hat Enterprise Linux 6
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat Enterprise Linux 6Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.

Published CVSS scores

7.3Red Hat, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/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-416Use After Free
T1499.004Application or System Exploitation

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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