Medium severity · published Oct 28, 2026
CVE-2026-93516
.Org Server XInput Passive Grab Use-After-Free
New
5.5
CVSS
–
EPSS
No
On KEV
Description
A use-after-free caused by lack of lifecycle management when adding / removing XInput master devices 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 in X server context.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
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
VulnerabilityMedium
ZDI-26-761: X.Org Server XInput Passive Grab 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 5.5. The following CVEs are assigned: CVE-2026-93516.
Oct 15, 2026·Zero Day Initiative
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93516
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-93516
patch
https://gitlab.freedesktop.org/xorg/xserver/-/commit/be572634158850fff4e9829cee88db08d30c9743
More from xorg-x11-server
7.8
CVE-2026-93523
X.Org Server XInput2 PassiveUngrabDevice Out-of-Bounds Write
7.8
CVE-2026-93522
X.Org Server Glamor CopyArea Heap Buffer Overflow
7.8
CVE-2026-93521
X.Org Server RandR ChangeProviderProperty Heap Buffer Overflow
7.8
CVE-2026-93520
X.Org Server XKB ChangeKeycodeRange Heap Out-of-Bounds Write
7.8
CVE-2026-93519
X.Org Server XFixes Pointer Barrier Event List Buffer Overflow