CVE-2023-6816
Critical
Description
A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap overflow if a bigger value was used.
SeverityCritical
CVSS9.8
Exploit probability—
Product
X.org X Server
PublishedJan 18, 2024
First seenJan 18, 2024
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- x.org x_server21.1.11 or later
- x.org xwayland23.2.4 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2024:0320
- access.redhat.com/errata/RHSA-2024:0557
- access.redhat.com/errata/RHSA-2024:0558
- access.redhat.com/errata/RHSA-2024:0597
- access.redhat.com/errata/RHSA-2024:0607
- access.redhat.com/errata/RHSA-2024:0614
- access.redhat.com/errata/RHSA-2024:0617
- access.redhat.com/errata/RHSA-2024:0621
- access.redhat.com/errata/RHSA-2024:0626
- access.redhat.com/errata/RHSA-2024:0629
- access.redhat.com/errata/RHSA-2024:2169
- access.redhat.com/errata/RHSA-2024:2170
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| x.org x_server | v < 21.1.11 | 21.1.11 |
| x.org xwayland | v < 23.2.4 | 23.2.4 |
| fedoraproject fedora | 39 | — |
| redhat enterprise_linux_desktop | 7.0 | — |
| redhat enterprise_linux_server | 7.0 | — |
| redhat enterprise_linux_workstation | 7.0 | — |
| debian debian_linux | 10.0 | — |
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