Medium severity · published Oct 28, 2026
CVE-2026-93536
X.Org Server GestureBuildSprite Use-After-Free
New
5.3
CVSS
–
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
XO
xorg-x11-server · x.org
before 21.1.25 · source: vendor
XW
xwayland · x.org
before 24.1.14 · source: vendor
In the news
VulnerabilityLow
ZDI-26-780: X.Org Server GestureBuildSprite Use-After-Free Information Disclosure Vulnerability
This vulnerability allows local attackers to disclose sensitive information on affected installations of X.Org Server. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 4.4. The following CVEs are assigned: CVE-2026-93536.
Oct 16, 2026·Zero Day Initiative
VulnerabilityHigh
Check your X.Org server version because a dozen vulnerabilities have been patched
X.Org fixed 12 security flaws in the X server and Xwayland, with the repairs shipping in xorg-server 21.1.25 and xwayland-24.1.14. Nine of the flaws can lead to arbitrary code execution. The other three can crash the server or disclose information. Ten of the 12 entries say an authenticated X client can trigger the flaw, meaning a program the server already accepts a connection from. The entries for CVE-2026-93524 and CVE-2026-93536 do not state that condition. … More →
The post Check your X.Org server version because a dozen vulnerabilities have been patched appeared first on Help Net Security .
Oct 7, 2026·Help Net Security
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93536
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-93536
patch
https://gitlab.freedesktop.org/xorg/xserver/-/commit/efcfd8acc754c5ac4b2555ff375dd5101d735b0a
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