Vulnerability · Published Oct 28, 2026 · Assigned by suse
CVE-2026-93536X.Org Server GestureBuildSprite Use-After-Free
Medium 5.3
In plain English
A medium-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 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 94.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A use after free caused by missing lifecycle management of gesture sprites in GestureBuildSprite() in X.Org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash the X server or potentially execute code.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | xorg-server | 21.1.25-r0 | ALPINE-CVE-2026-93536 |
| Alpine:v3.24 | xwayland | 24.1.14-r0 | ALPINE-CVE-2026-93536 |
| Debian:12 | xorg-server | no fix listed | DEBIAN-CVE-2026-93536 |
| Debian:13 | xorg-server | no fix listed | DEBIAN-CVE-2026-93536 |
| Debian:14 | xorg-server | 2:21.1.25-1 | DEBIAN-CVE-2026-93536 |
| Debian:12 | xwayland | no fix listed | DEBIAN-CVE-2026-93536 |
| Debian:13 | xwayland | no fix listed | DEBIAN-CVE-2026-93536 |
| Debian:14 | xwayland | 2:24.1.14-1 | DEBIAN-CVE-2026-93536 |
| Ubuntu:22.04:LTS | xorg-server | no fix listed | UBUNTU-CVE-2026-93536 |
| Ubuntu:24.04:LTS | xorg-server | no fix listed | UBUNTU-CVE-2026-93536 |
| Ubuntu:26.04:LTS | xorg-server | no fix listed | UBUNTU-CVE-2026-93536 |
| Ubuntu:26.10 | xorg-server | no fix listed | UBUNTU-CVE-2026-93536 |
| Ubuntu:22.04:LTS | xwayland | no fix listed | UBUNTU-CVE-2026-93536 |
| Ubuntu:24.04:LTS | xwayland | no fix listed | UBUNTU-CVE-2026-93536 |
| Ubuntu:26.04:LTS | xwayland | no fix listed | UBUNTU-CVE-2026-93536 |
| Ubuntu:26.10 | xwayland | no fix listed | UBUNTU-CVE-2026-93536 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| x.org | xorg-x11-server | 0 – before 21.1.25 |
| x.org | xwayland | 0 – before 24.1.14 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H