CVE-2023-6816
Xorg-x11-server: heap buffer overflow in devicefocusevent and procxiquerypointer
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Timeline
ID reserved
By redhat
- 35 days later
· 35 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 2.1% · top 18% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
Red Hat · Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
- unaffected 0:1.1.0-25.el6_10.13 – < *
Red Hat · Red Hat Enterprise Linux 7
- unaffected 0:1.20.4-27.el7_9 – < *
Red Hat · Red Hat Enterprise Linux 7
- unaffected 0:1.8.0-31.el7_9 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:1.13.1-2.el8_9.7 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:1.20.11-22.el8 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:21.1.3-15.el8 – < *
Red Hat · Red Hat Enterprise Linux 8.2 Advanced Update Support
- unaffected 0:1.9.0-15.el8_2.9 – < *
Red Hat · Red Hat Enterprise Linux 8.2 Telecommunications Update Service
- unaffected 0:1.9.0-15.el8_2.9 – < *
Red Hat · Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
- unaffected 0:1.9.0-15.el8_2.9 – < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- unaffected 0:1.11.0-8.el8_4.8 – < *
Red Hat · Red Hat Enterprise Linux 8.4 Telecommunications Update Service
- unaffected 0:1.11.0-8.el8_4.8 – < *
Red Hat · Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
- unaffected 0:1.11.0-8.el8_4.8 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support
- unaffected 0:1.12.0-6.el8_6.9 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Extended Update Support
- unaffected 0:1.12.0-15.el8_8.7 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:1.13.1-3.el9_3.6 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:1.20.11-24.el9 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:22.1.9-5.el9 – < *
Red Hat · Red Hat Enterprise Linux 9.0 Extended Update Support
- unaffected 0:1.11.0-22.el9_0.8 – < *
Red Hat · Red Hat Enterprise Linux 9.2 Extended Update Support
- unaffected 0:1.12.0-14.el9_2.5 – < *
Red Hat · Red Hat Enterprise Linux 6
All versions: unknown
What to do
Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
References (24)
- RHSA-2024:0320 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0557 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0558 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0597 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0607 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0614 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0617 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0621 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0626 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0629 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:2169 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:2170 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:2995 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2024:2996 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2025:12751 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2023-6816 (opens in a new tab)vdb-entryx_refsource_REDHATx_transferred
- RHBZ#2257691 (opens in a new tab)issue-trackingx_refsource_REDHATx_transferred
- http://www.openwall.com/lists/oss-security/2024/01/18/1 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2024/01/msg00016.html (opens in a new tab)x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/5J4H7CH565ALSZZYKOJFYDA5KFLG6NUK/ (opens in a new tab)x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/EJBMCWQ54R6ZL3MYU2D2JBW6JMZL7BQW/ (opens in a new tab)x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/IZ75X54CN4IFYMIV7OK3JVZ57FHQIGIC/ (opens in a new tab)x_transferred
- https://security.gentoo.org/glsa/202401-30 (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20240307-0006/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-6816)Record last updated .