High severity · published Oct 30, 2025
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
7.3
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AI
Aix · Ibm
7.2.5 before 7.2.5.12; 7.3.2 before 7.3.3.3; 7.3.4 · source: NVD
DL
Debian Linux · Debian
11.0 · source: NVD
EL
Enterprise Linux · Redhat
8.0; 9.0; 10.0 · source: NVD
EL
Enterprise Linux Aus · Redhat
8.2; 8.4; 8.6 · source: NVD
EL
Enterprise Linux Els · Redhat
6.0; 7.0 · source: NVD
EL
Enterprise Linux Eus · Redhat
8.4; 9.4 · source: NVD
EL
Enterprise Linux Tus · Redhat
8.6; 8.8 · source: NVD
EL
Enterprise Linux Update Services For Sap Solutions · Redhat
8.6; 8.8; 9.0; 9.2 · source: NVD
VI
Vios · Ibm
4.1.0 before 4.1.1.30; 4.1.2.0 · source: NVD
XS
X Server · X.org
before 21.1.19 · source: NVD
XW
Xwayland · X.org
before 24.1.9 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-62231
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-62231
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:19432
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:19433
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:19434
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:19435
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:19489
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:19623
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