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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| x.org | xorg-x11-server | < 21.1.25 | 21.1.25 |
| x.org | xwayland | 9 – < 24.1.14 | 24.1.14 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | xwayland | 2:24.1.14-1 | — |
| Debian 13 | xwayland | No fix yet | — |
| Debian 12 | xwayland | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | xwayland +1 | No fix yet | — |
| Ubuntu 26.04 LTS | xwayland +1 | No fix yet | — |
| Ubuntu 24.04 LTS | xwayland +1 | No fix yet | — |
| Ubuntu 22.04 LTS | xwayland +1 | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | xorg-server | No fix yet | — |
| Ubuntu Pro 18.04 LTS | xorg-server +1 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | xorg-server +1 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | xorg-server | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | xorg-x11-server-Xwayland +1 | 24.1.9-4.el10_2.4 | RHSA-2026:85191 |
| RHEL 9 | xorg-x11-server-Xwayland +1 | 24.1.9-4.el9_8.4 | RHSA-2026:85193 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | xorg-x11-server-Xwayland +1 | 24.1.9-4.el10_2.4 | ALSA-2026:85191 |
| AlmaLinux 9 | xorg-x11-server-Xwayland +1 | 24.1.9-4.el9_8.4 | ALSA-2026:85193 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | xorg-x11-server-Xwayland | 24.1.9-4.el10_2.4 | RLSA-2026:85191 |
| Rocky Linux 9 | xorg-x11-server-Xwayland | 24.1.9-4.el9_8.4 | RLSA-2026:85193 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | xwayland | 24.1.5-150700.3.25.1 | SUSE-SU-2026:4835-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | xwayland | 24.1.6-160000.7.1 | SUSE-SU-2026:24230-1 |
| SLES 16.0 | xwayland | 24.1.6-160000.7.1 | SUSE-SU-2026:24230-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xwayland | 24.1.13-2.1 | openSUSE-SU-2026:12105-1 |
| openSUSE Leap 16.0 | xwayland | 24.1.6-160000.7.1 | openSUSE-SU-2026:22085-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xorg-server | 21.1.25-r0 | — |
| Alpine v3.24 | xwayland | 24.1.14-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | xorg-x11-server-Xwayland +1 | 24.1.3-1.amzn2023.0.7 | ALAS2023-2026-3261 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | xorg-x11-server | No fix yet | — |
| Azure Linux 3 | xorg-x11-server-Xwayland | 24.1.14-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | xorg-x11-server-Xwayland +1 | 24.1.9-4.el10_2.4 | ELSA-2026-85191 |
| Oracle Linux 9 | xorg-x11-server-Xwayland +1 | 24.1.9-4.el9_8.4 | ELSA-2026-85193 |
Advisories 14
- WID-SEC-2026-3787 X.Org X11 und Xwayland: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- ALSA-2026:85193 Important: xorg-x11-server-Xwayland security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:85191 Important: xorg-x11-server-Xwayland security update AlmaLinux Security Advisories · Oct 29, 2026
- ALAS2023-2026-3261 Important: xorg-x11-server-Xwayland security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 26, 2026
- SUSE-SU-2026:4835-1 Security update for xwayland SUSE / openSUSE Security Updates · Oct 22, 2026
- SUSE-SU-2026:24230-1 Security update for xwayland SUSE / openSUSE Security Updates · Oct 21, 2026
- RLSA-2026:85193 Important: xorg-x11-server-Xwayland security update Rocky Linux Security Advisories · Oct 20, 2026
- RLSA-2026:85191 Important: xorg-x11-server-Xwayland security update Rocky Linux Security Advisories · Oct 20, 2026
- RHSA-2026:85191 Red Hat Security Advisory: xorg-x11-server-Xwayland security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:85193 Red Hat Security Advisory: xorg-x11-server-Xwayland security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- openSUSE-SU-2026:22085-1 Security update for xwayland SUSE / openSUSE Security Updates · Oct 19, 2026
- ELSA-2026-85191 Important: xorg-x11-server-Xwayland security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Oct 19, 2026
- ELSA-2026-85193 Important: xorg-x11-server-Xwayland security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 19, 2026
- openSUSE-SU-2026:12105-1 xwayland-24.1.13-2.1 on GA media SUSE / openSUSE Security Updates · Oct 11, 2026