CVE-2025-26601

EUVD-2025-5426
A use-after-free flaw was found in X.Org and Xwayland. When changing an alarm, the values of the change mask are evaluated one after the other, changing the trigger values as requested, and eventually, SyncInitTrigger() is called. If one of the changes triggers an error, the function will return early, not adding the new sync object, possibly causing a use-after-free when the alarm eventually triggers.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 28%
Affected Products (NVD)
VendorProductVersion
tigervnctigervnc
-
x.orgx_server
𝑥
< 21.1.16
x.orgxwayland
𝑥
< 24.1.6
redhatenterprise_linux
7.0
redhatenterprise_linux
8.0
redhatenterprise_linux
9.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
xorg-server
bookworm
2:21.1.7-3+deb12u12
fixed
bookworm (security)
2:21.1.7-3+deb12u11
fixed
bullseye
vulnerable
bullseye (security)
2:1.20.11-1+deb11u17
fixed
forky
2:21.1.23-1
fixed
sid
2:21.1.23-1
fixed
trixie
2:21.1.16-1.3+deb13u3
fixed
trixie (security)
2:21.1.16-1.3+deb13u3
fixed
xwayland
bookworm
ignored
forky
2:24.1.12-1
fixed
sid
2:24.1.12-1
fixed
trixie
2:24.1.6-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
xorg
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
oracular
not-affected
plucky
not-affected
questing
not-affected
resolute
not-affected
xenial
not-affected
xorg-hwe-16.04
focal
dne
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
xenial
not-affected
xorg-hwe-18.04
bionic
not-affected
focal
dne
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
xorg-server
bionic
Fixed 2:1.19.6-1ubuntu4.15+esm12
released
focal
Fixed 2:1.20.13-1ubuntu1~20.04.19
released
jammy
Fixed 2:21.1.4-2ubuntu1.7~22.04.13
released
noble
Fixed 2:21.1.12-1ubuntu1.2
released
oracular
Fixed 2:21.1.13-2ubuntu1.2
released
plucky
Fixed 2:21.1.16-1ubuntu1
released
questing
Fixed 2:21.1.16-1ubuntu1
released
resolute
Fixed 2:21.1.16-1ubuntu1
released
trusty
needs-triage
xenial
Fixed 2:1.18.4-0ubuntu0.12+esm17
released
xorg-server-hwe-16.04
focal
dne
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
xenial
Fixed 2:1.19.6-1ubuntu4.1~16.04.6+esm9
released
xorg-server-hwe-18.04
bionic
Fixed 2:1.20.8-2ubuntu2.2~18.04.11+esm4
released
focal
dne
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
xwayland
focal
dne
jammy
Fixed 2:22.1.1-1ubuntu0.17
released
noble
Fixed 2:23.2.6-1ubuntu0.4
released
oracular
Fixed 2:24.1.2-1ubuntu0.4
released
plucky
Fixed 2:24.1.5-1ubuntu1
released
questing
Fixed 2:24.1.5-1ubuntu1
released
resolute
Fixed 2:24.1.5-1ubuntu1
released
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
xorg-x11-server
suse enterprise desktop 15 SP6
21.1.11-150600.5.6.1
fixed
suse enterprise desktop 15 SP7
21.1.15-150700.3.2
fixed
suse enterprise sap 15 SP6
21.1.11-150600.5.6.1
fixed
suse enterprise sap 15 SP7
21.1.15-150700.3.2
fixed
suse enterprise server 12 SP5
1.19.6-10.80.1
fixed
suse enterprise server 15 SP2
1.20.3-150200.22.5.102.1
fixed
suse enterprise server 15 SP3
1.20.3-150200.22.5.102.1
fixed
suse enterprise server 15 SP4
1.20.3-150400.38.54.1
fixed
suse enterprise server 15 SP5
21.1.4-150500.7.32.1
fixed
suse enterprise server 15 SP6
21.1.11-150600.5.6.1
fixed
suse enterprise server 15 SP7
21.1.15-150700.3.2
fixed
xorg-x11-server-Xvfb
suse enterprise desktop 15 SP6
21.1.11-150600.5.6.1
fixed
suse enterprise desktop 15 SP7
21.1.15-150700.3.2
fixed
suse enterprise sap 15 SP6
21.1.11-150600.5.6.1
fixed
suse enterprise sap 15 SP7
21.1.15-150700.3.2
fixed
suse enterprise server 15 SP5
21.1.4-150500.7.32.1
fixed
suse enterprise server 15 SP6
21.1.11-150600.5.6.1
fixed
suse enterprise server 15 SP7
21.1.15-150700.3.2
fixed
xorg-x11-server-extra
suse enterprise desktop 15 SP6
21.1.11-150600.5.6.1
fixed
suse enterprise desktop 15 SP7
21.1.15-150700.3.2
fixed
suse enterprise sap 15 SP6
21.1.11-150600.5.6.1
fixed
suse enterprise sap 15 SP7
21.1.15-150700.3.2
fixed
suse enterprise server 12 SP5
1.19.6-10.80.1
fixed
suse enterprise server 15 SP2
1.20.3-150200.22.5.102.1
fixed
suse enterprise server 15 SP3
1.20.3-150200.22.5.102.1
fixed
suse enterprise server 15 SP4
1.20.3-150400.38.54.1
fixed
suse enterprise server 15 SP5
21.1.4-150500.7.32.1
fixed
suse enterprise server 15 SP6
21.1.11-150600.5.6.1
fixed
suse enterprise server 15 SP7
21.1.15-150700.3.2
fixed
xorg-x11-server-sdk
suse enterprise server 15 SP2
1.20.3-150200.22.5.102.1
fixed
suse enterprise server 15 SP3
1.20.3-150200.22.5.102.1
fixed
suse enterprise server 15 SP4
1.20.3-150400.38.54.1
fixed
suse enterprise server 15 SP5
21.1.4-150500.7.32.1
fixed
xorg-x11-server-wayland
suse enterprise desktop 15 SP6
1.20.3-150200.22.5.102.1
fixed
suse enterprise sap 15 SP6
1.20.3-150200.22.5.102.1
fixed
suse enterprise server 15 SP6
1.20.3-150200.22.5.102.1
fixed
suse enterprise workstation 15 SP6
1.20.3-150200.22.5.102.1
fixed
xwayland
suse enterprise desktop 15 SP6
24.1.1-150600.5.9.1
fixed
suse enterprise sap 15 SP6
24.1.1-150600.5.9.1
fixed
suse enterprise server 15 SP6
24.1.1-150600.5.9.1
fixed
suse enterprise workstation 15 SP6
24.1.1-150600.5.9.1
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
tigervnc
RHEL 8
0:1.13.1-15.el8_10
fixed
RHEL 8.2 AUS
0:1.9.0-15.el8_2.13
fixed
RHEL 8.4 AUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 E4S
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 TUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.6 AUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 E4S
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 TUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.8 AUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 E4S
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 EUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 TUS
0:1.12.0-15.el8_8.12
fixed
RHEL 9
0:1.14.1-1.el9_5.1
fixed
tigervnc-icons
RHEL 8
0:1.13.1-15.el8_10
fixed
RHEL 8.2 AUS
0:1.9.0-15.el8_2.13
fixed
RHEL 8.4 AUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 E4S
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 TUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.6 AUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 E4S
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 TUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.8 AUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 E4S
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 EUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 TUS
0:1.12.0-15.el8_8.12
fixed
RHEL 9
0:1.14.1-1.el9_5.1
fixed
tigervnc-license
RHEL 8
0:1.13.1-15.el8_10
fixed
RHEL 8.2 AUS
0:1.9.0-15.el8_2.13
fixed
RHEL 8.4 AUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 E4S
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 TUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.6 AUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 E4S
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 TUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.8 AUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 E4S
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 EUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 TUS
0:1.12.0-15.el8_8.12
fixed
RHEL 9
0:1.14.1-1.el9_5.1
fixed
tigervnc-selinux
RHEL 8
0:1.13.1-15.el8_10
fixed
RHEL 8.4 AUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 E4S
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 TUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.6 AUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 E4S
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 TUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.8 AUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 E4S
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 EUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 TUS
0:1.12.0-15.el8_8.12
fixed
RHEL 9
0:1.14.1-1.el9_5.1
fixed
tigervnc-server
RHEL 8
0:1.13.1-15.el8_10
fixed
RHEL 8.2 AUS
0:1.9.0-15.el8_2.13
fixed
RHEL 8.4 AUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 E4S
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 TUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.6 AUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 E4S
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 TUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.8 AUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 E4S
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 EUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 TUS
0:1.12.0-15.el8_8.12
fixed
RHEL 9
0:1.14.1-1.el9_5.1
fixed
tigervnc-server-applet
RHEL 8.2 AUS
0:1.9.0-15.el8_2.13
fixed
tigervnc-server-minimal
RHEL 8
0:1.13.1-15.el8_10
fixed
RHEL 8.2 AUS
0:1.9.0-15.el8_2.13
fixed
RHEL 8.4 AUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 E4S
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 TUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.6 AUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 E4S
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 TUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.8 AUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 E4S
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 EUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 TUS
0:1.12.0-15.el8_8.12
fixed
RHEL 9
0:1.14.1-1.el9_5.1
fixed
tigervnc-server-module
RHEL 8
0:1.13.1-15.el8_10
fixed
RHEL 8.2 AUS
0:1.9.0-15.el8_2.13
fixed
RHEL 8.4 AUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 E4S
0:1.11.0-8.el8_4.12
fixed
RHEL 8.4 TUS
0:1.11.0-8.el8_4.12
fixed
RHEL 8.6 AUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 E4S
0:1.12.0-6.el8_6.13
fixed
RHEL 8.6 TUS
0:1.12.0-6.el8_6.13
fixed
RHEL 8.8 AUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 E4S
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 EUS
0:1.12.0-15.el8_8.12
fixed
RHEL 8.8 TUS
0:1.12.0-15.el8_8.12
fixed
RHEL 9
0:1.14.1-1.el9_5.1
fixed
xorg-x11-server-Xdmx
RHEL 9
0:1.20.11-28.el9_6
fixed
xorg-x11-server-Xephyr
RHEL 9
0:1.20.11-28.el9_6
fixed
xorg-x11-server-Xnest
RHEL 9
0:1.20.11-28.el9_6
fixed
xorg-x11-server-Xorg
RHEL 9
0:1.20.11-28.el9_6
fixed
xorg-x11-server-Xvfb
RHEL 9
0:1.20.11-28.el9_6
fixed
xorg-x11-server-Xwayland
RHEL 9
0:23.2.7-3.el9_6
fixed
xorg-x11-server-Xwayland-devel
RHEL 9
0:23.2.7-3.el9_6
fixed
xorg-x11-server-common
RHEL 9
0:1.20.11-28.el9_6
fixed
xorg-x11-server-devel
RHEL 9
0:1.20.11-28.el9_6
fixed
xorg-x11-server-source
RHEL 9
0:1.20.11-28.el9_6
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
xorg-x11-server-Xdmx
Amazon Linux 2
0:1.20.4-22.amzn2.0.8
fixed
xorg-x11-server-Xephyr
Amazon Linux 2
0:1.20.4-22.amzn2.0.8
fixed
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-Xephyr-debuginfo
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-Xnest
Amazon Linux 2
0:1.20.4-22.amzn2.0.8
fixed
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-Xnest-debuginfo
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-Xorg
Amazon Linux 2
0:1.20.4-22.amzn2.0.8
fixed
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-Xorg-debuginfo
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-Xvfb
Amazon Linux 2
0:1.20.4-22.amzn2.0.8
fixed
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-Xvfb-debuginfo
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-Xwayland
Amazon Linux 2
0:1.20.4-22.amzn2.0.8
fixed
Amazon Linux 2023
0:24.1.3-1.amzn2023.0.1
fixed
xorg-x11-server-Xwayland-debuginfo
Amazon Linux 2023
0:24.1.3-1.amzn2023.0.1
fixed
xorg-x11-server-Xwayland-debugsource
Amazon Linux 2023
0:24.1.3-1.amzn2023.0.1
fixed
xorg-x11-server-Xwayland-devel
Amazon Linux 2023
0:24.1.3-1.amzn2023.0.1
fixed
xorg-x11-server-common
Amazon Linux 2
0:1.20.4-22.amzn2.0.8
fixed
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-debuginfo
Amazon Linux 2
0:1.20.4-22.amzn2.0.8
fixed
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-debugsource
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-devel
Amazon Linux 2
0:1.20.4-22.amzn2.0.8
fixed
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
xorg-x11-server-source
Amazon Linux 2
0:1.20.4-22.amzn2.0.8
fixed
Amazon Linux 2023
0:21.1.13-5.amzn2023.0.3
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
xorg-x11-server
CBL-Mariner 2.0
0:1.20.10-15.cm2
fixed
xorg-x11-server-Xwayland
Azure Linux 3.0
0:24.1.6-1.azl3
fixed
Common Weakness Enumeration
References
https://access.redhat.com/errata/RHSA-2025:2500
https://access.redhat.com/errata/RHSA-2025:2502
https://access.redhat.com/errata/RHSA-2025:2861
https://access.redhat.com/errata/RHSA-2025:2862
https://access.redhat.com/errata/RHSA-2025:2865
https://access.redhat.com/errata/RHSA-2025:2866
https://access.redhat.com/errata/RHSA-2025:2873
https://access.redhat.com/errata/RHSA-2025:2874
https://access.redhat.com/errata/RHSA-2025:2875
https://access.redhat.com/errata/RHSA-2025:2879
https://access.redhat.com/errata/RHSA-2025:2880
https://access.redhat.com/errata/RHSA-2025:3976
https://access.redhat.com/errata/RHSA-2025:7163
https://access.redhat.com/errata/RHSA-2025:7165
https://access.redhat.com/errata/RHSA-2025:7458
https://access.redhat.com/security/cve/CVE-2025-26601
https://bugzilla.redhat.com/show_bug.cgi?id=2345251
https://lists.debian.org/debian-lts-announce/2025/02/msg00036.html
https://security.netapp.com/advisory/ntap-20250516-0004/