Vulnerability · Published Oct 28, 2026 · Assigned by suse
CVE-2026-93522X.Org Server Glamor CopyArea Heap Buffer Overflow
High 7.8
In plain English
A high-severity heap buffer overflow in xorg-x11-server from x.org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 89.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A heap buffer overflow caused by mismatched size usage in CopyArea CPU-to-FBO path in X.Org X Server before 21.1.15 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in the X server context.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | xorg-x11-server-Xwayland | 24.1.9-4.el10_2.4 | ALSA-2026:85191 |
| AlmaLinux:9 | xorg-x11-server-Xwayland | 24.1.9-4.el9_8.4 | ALSA-2026:85193 |
| AlmaLinux:10 | xorg-x11-server-Xwayland-devel | 24.1.9-4.el10_2.4 | ALSA-2026:85191 |
| AlmaLinux:9 | xorg-x11-server-Xwayland-devel | 24.1.9-4.el9_8.4 | ALSA-2026:85193 |
| Alpine:v3.24 | xorg-server | 21.1.25-r0 | ALPINE-CVE-2026-93522 |
| Alpine:v3.24 | xwayland | 24.1.14-r0 | ALPINE-CVE-2026-93522 |
| Debian:12 | xwayland | no fix listed | DEBIAN-CVE-2026-93522 |
| Debian:13 | xwayland | no fix listed | DEBIAN-CVE-2026-93522 |
| Debian:14 | xwayland | 2:24.1.14-1 | DEBIAN-CVE-2026-93522 |
| Rocky Linux:10 | xorg-x11-server-Xwayland | 0:24.1.9-4.el10_2.4 | RLSA-2026:85191 |
| Rocky Linux:9 | xorg-x11-server-Xwayland | 0:24.1.9-4.el9_8.4 | RLSA-2026:85193 |
| Ubuntu:22.04:LTS | xorg-server | no fix listed | UBUNTU-CVE-2026-93522 |
| Ubuntu:24.04:LTS | xorg-server | no fix listed | UBUNTU-CVE-2026-93522 |
| Ubuntu:26.04:LTS | xorg-server | no fix listed | UBUNTU-CVE-2026-93522 |
| Ubuntu:26.10 | xorg-server | no fix listed | UBUNTU-CVE-2026-93522 |
| Ubuntu:22.04:LTS | xwayland | no fix listed | UBUNTU-CVE-2026-93522 |
| Ubuntu:24.04:LTS | xwayland | no fix listed | UBUNTU-CVE-2026-93522 |
| Ubuntu:26.04:LTS | xwayland | no fix listed | UBUNTU-CVE-2026-93522 |
| Ubuntu:26.10 | xwayland | no fix listed | UBUNTU-CVE-2026-93522 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| x.org | xorg-x11-server | 0 – before 21.1.25 |
| x.org | xwayland | 9 – before 24.1.14 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H