CVE-2025-49177

EUVD-2025-18499
A flaw was found in the XFIXES extension. The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.1 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
redhatCNA
6.1 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 6%
Debian logo
Debian Releases
Debian Product
Codename
xorg-server
bookworm
2:21.1.7-3+deb12u11
ignored
bookworm (security)
2:21.1.7-3+deb12u11
fixed
bullseye
2:1.20.11-1+deb11u13
not-affected
bullseye (security)
2:1.20.11-1+deb11u17
fixed
forky
2:21.1.21-1
fixed
sid
2:21.1.21-1
fixed
trixie
2:21.1.16-1.3+deb13u1
ignored
trixie (security)
2:21.1.16-1.3+deb13u1
fixed
xwayland
bookworm
ignored
bullseye
not-affected
forky
2:24.1.9-1
fixed
sid
2:24.1.9-1
fixed
trixie
ignored
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
xorg-server
bionic
needs-triage
focal
needs-triage
jammy
Fixed 2:21.1.4-2ubuntu1.7~22.04.15
released
noble
Fixed 2:21.1.12-1ubuntu1.4
released
oracular
Fixed 2:21.1.13-2ubuntu1.4
released
plucky
Fixed 2:21.1.16-1ubuntu1.1
released
questing
Fixed 2:21.1.18-1ubuntu1
released
trusty
needs-triage
xenial
needs-triage
xwayland
jammy
Fixed 2:22.1.1-1ubuntu0.19
released
noble
Fixed 2:23.2.6-1ubuntu0.6
released
oracular
Fixed 2:24.1.2-1ubuntu0.6
released
plucky
Fixed 2:24.1.6-1ubuntu0.1
released
questing
Fixed 2:24.1.6-1ubuntu1
released
xorg
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
oracular
not-affected
plucky
not-affected
questing
not-affected
xenial
not-affected
xorg-server-hwe-16.04
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
xenial
needs-triage
xorg-server-hwe-18.04
bionic
needs-triage
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
xorg-hwe-16.04
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
xenial
not-affected
xorg-hwe-18.04
bionic
not-affected
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
Common Weakness Enumeration
References
https://access.redhat.com/errata/RHSA-2025:10258
https://access.redhat.com/errata/RHSA-2025:9303
https://access.redhat.com/errata/RHSA-2025:9304
https://access.redhat.com/security/cve/CVE-2025-49177
https://bugzilla.redhat.com/show_bug.cgi?id=2369955
https://gitlab.freedesktop.org/xorg/xserver/-/commit/ab02fb96b1c701c3bb47617d965522c34befa6af
https://www.x.org/wiki/Development/Security/