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CVE-2025-26594

X.org: xwayland: use-after-free of the root cursor

HIGH
7.8
CVSS Score
Published: February 25, 2025 at 03:53 PM UTC
Updated: June 29, 2026 at 09:16 PM UTC
4 products affected across 3 vendorsEnterprise LinuxX serverXwayland

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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

A use-after-free flaw was found in X.Org and Xwayland. The root cursor is referenced in the X server as a global variable. If a client frees the root cursor, the internal reference points to freed memory and causes a use-after-free.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Enterprise Linux· Red Hatrpm
95%
7.08.09.0
Vendor states this is fixed in 0:1.1.0-25.el6_10 (unaffected)
Vendor states this is fixed in 0:1.11.0-22.el9_0.13 (unaffected)
Vendor states this is fixed in 0:1.11.0-8.el8_4.12 (unaffected)
Vendor states this is fixed in 0:1.12.0-14.el9_2.10 (unaffected)
Vendor states this is fixed in 0:1.12.0-15.el8_8.12 (unaffected)
Vendor states this is fixed in 0:1.12.0-6.el8_6.13 (unaffected)
Vendor states this is fixed in 0:1.13.1-15.el8_10 (unaffected)
Vendor states this is fixed in 0:1.13.1-8.el9_4.5 (unaffected)
Vendor states this is fixed in 0:1.14.1-1.el9_5.1 (unaffected)
Vendor states this is fixed in 0:1.20.11-28.el9_6 (unaffected)
Vendor states this is fixed in 0:1.20.4-30.el7_9 (unaffected)
Vendor states this is fixed in 0:1.8.0-36.el7_9 (unaffected)
Vendor states this is fixed in 0:1.9.0-15.el8_2.13 (unaffected)
Vendor states this is fixed in 0:23.2.7-3.el9_6 (unaffected)
Vendor states this is fixed in 0:24.1.5-3.el10_0 (unaffected)
Vendor states this is fixed in 8 (unaffected)
Vendor states this is fixed in 6 (unknown)
Tigervnc· Tigervnc
95%
All versions
X server· X Org
95%
v < 21.1.16
Affected range stops below 21.1.16, so it looks safe — our inference, not a vendor statement
Xwayland· X Org
95%
v < 24.1.6
Affected range stops below 24.1.6, so it looks safe — our inference, not a vendor statement

References (18)

Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2025:2500
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2025:2502
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2025:2861
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2025:2862
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2025:2865
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2025:2866
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2025:2873
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2025:2874

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHredhat
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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