🛡️ CVE-2023-6816 — debian-linux
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.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.
Weakness class
CVE-2023-6816 is classified as CWE-787: Out-of-bounds Write. Data is written past the end or before the start of a buffer, corrupting whatever is stored there.
Affected software
CVE-2023-6816 is recorded against 7 packages.
- debian-linux
- enterprise-linux-desktop
- enterprise-linux-server
- enterprise-linux-workstation
- fedora
- x-server (fixed in 21.1.11)
- xwayland (fixed in 23.2.4)
Timeline and source
Published on 18 January 2024 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.
References
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
CVE-2023-6816 on other distributions
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| debian-linux | — | — |
| enterprise-linux-desktop | — | — |
| enterprise-linux-server | — | — |
| enterprise-linux-workstation | — | — |
| fedora | — | — |
| x-server | — | 21.1.11 |
| xwayland | — | 23.2.4 |
References
Similar Threats
- Critical CVE-2022-0194
- High CVE-2022-0367
- Medium CVE-2022-0171
- High CVE-2022-0135
- High CVE-2022-0204
More CVE 2023 advisories
Browse all of CVE 2023 in the advisory index.
Exploit Protection
Are you running debian-linux?
CVE-2023-6816 carries CVSS 9.8 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.
Check My Site For CVE-2023-6816 →No credit card required · Results in minutes
ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.