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Vulnerabilities

Vulnerability · CVE-2025-62231

A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow.

Published Oct 30, 2025 · catalog updated Apr 20, 2026 · Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions

Check if you run it

No confirmed exploitation is on record for CVE-2025-62231. EPSS is 0.30%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.30%
Remediation
Vendor / distro source
Affected products
vendor Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions patch: 0:21.1.3-2.el8_6.5

A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory corruption or a crash.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions patch: 0:21.1.3-2.el8_6.5patch: 0:21.1.3-2.el8_6.5

How to fix CVE-2025-62231

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-62231. EPSS is 0.30%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions is installed.

Which versions are affected?

Compare what you have installed with Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions patch: 0:21.1.3-2.el8_6.5 patch: 0:21.1.3-2.el8_6.5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.30%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 30, 2025 · EUVD

    Detected

    A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory corruption or a crash.

  2. Apr 20, 2026 · EUVD

    Updated

    A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory corruption or a crash.

Sources

  • CVE.orgVulnerability recordCVE-2025-62231

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-62231

    30-day exploitation probability 0.30%

    first.org
  • EUVDVulnerability recordEUVD-2025-36898

    A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 24, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.