CVE-2025-62231
High
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.
SeverityHigh
CVSS7.3
Exploit probability—
Product
X.org X Server
PublishedOct 30, 2025
First seenOct 30, 2025
Weakness typeCWE-190Integer overflow
How to fix
Update
- x.org x_server21.1.19 or later
- x.org xwayland24.1.9 or later
- ibm vios4.1.1.30 or later
- ibm aix7.2.5.12, 7.3.3.3 or later
Vendor advisories
- lists.x.org/archives/xorg-announce/2025-October/003635.html
- access.redhat.com/errata/RHSA-2025:19432
- access.redhat.com/errata/RHSA-2025:19433
- access.redhat.com/errata/RHSA-2025:19434
- access.redhat.com/errata/RHSA-2025:19435
- access.redhat.com/errata/RHSA-2025:19489
- access.redhat.com/errata/RHSA-2025:19623
- access.redhat.com/errata/RHSA-2025:19909
- access.redhat.com/errata/RHSA-2025:20958
- access.redhat.com/errata/RHSA-2025:20960
- access.redhat.com/errata/RHSA-2025:20961
- access.redhat.com/errata/RHSA-2025:21035
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| x.org x_server | v < 21.1.19 | 21.1.19 |
| x.org xwayland | v < 24.1.9 | 24.1.9 |
| ibm vios | 4.1.0 ≤ v < 4.1.1.30, 4.1.2.0 | 4.1.1.30 |
| ibm aix | 7.2.5 ≤ v < 7.2.5.12, 7.3.2 ≤ v < 7.3.3.3, 7.3.4 | 7.2.5.12, 7.3.3.3 |
| debian debian_linux | 11.0 | — |
| redhat enterprise_linux | 8.0, 9.0, 10.0 | — |
| redhat enterprise_linux_aus | 8.2, 8.4, 8.6 | — |
| redhat enterprise_linux_els | 6.0, 7.0 | — |
| redhat enterprise_linux_eus | 8.4, 9.4 | — |
| redhat enterprise_linux_tus | 8.6, 8.8 | — |
| redhat enterprise_linux_update_services_for_sap_solutions | 8.6, 8.8, 9.0, 9.2 | — |
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