CVE-2025-49179

EUVD-2025-18500
A flaw was found in the X Record extension. The RecordSanityCheckRegisterClients function does not check for an integer overflow when computing request length, which allows a client to bypass length checks.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
redhatCNA
7.3 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
x.orgxwayland
𝑥
< 24.1.7
CNA
Debian logo
Debian Releases
Debian Product
Codename
xorg-server
bookworm
2:21.1.7-3+deb12u11
fixed
bookworm (security)
2:21.1.7-3+deb12u11
fixed
bullseye
vulnerable
bullseye (security)
2:1.20.11-1+deb11u17
fixed
forky
2:21.1.21-1
fixed
sid
2:21.1.21-1
fixed
trixie
2:21.1.16-1.3+deb13u1
fixed
trixie (security)
2:21.1.16-1.3+deb13u1
fixed
xwayland
bookworm
vulnerable
forky
2:24.1.9-1
fixed
sid
2:24.1.9-1
fixed
trixie
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
xorg-server
bionic
Fixed 2:1.19.6-1ubuntu4.15+esm13
released
focal
Fixed 2:1.20.13-1ubuntu1~20.04.20+esm1
released
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
Fixed 2:1.18.4-0ubuntu0.12+esm18
released
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
Fixed 2:1.19.6-1ubuntu4.1~16.04.6+esm10
released
xorg-server-hwe-18.04
bionic
Fixed 2:1.20.8-2ubuntu2.2~18.04.11+esm5
released
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-2025:10342
https://access.redhat.com/errata/RHSA-2025:10343
https://access.redhat.com/errata/RHSA-2025:10344
https://access.redhat.com/errata/RHSA-2025:10346
https://access.redhat.com/errata/RHSA-2025:10347
https://access.redhat.com/errata/RHSA-2025:10348
https://access.redhat.com/errata/RHSA-2025:10349
https://access.redhat.com/errata/RHSA-2025:10350
https://access.redhat.com/errata/RHSA-2025:10351
https://access.redhat.com/errata/RHSA-2025:10352
https://access.redhat.com/errata/RHSA-2025:10355
https://access.redhat.com/errata/RHSA-2025:10356
https://access.redhat.com/errata/RHSA-2025:10360
https://access.redhat.com/errata/RHSA-2025:10370
https://access.redhat.com/errata/RHSA-2025:10374
https://access.redhat.com/errata/RHSA-2025:10375
https://access.redhat.com/errata/RHSA-2025:10376
https://access.redhat.com/errata/RHSA-2025:10377
https://access.redhat.com/errata/RHSA-2025:10378
https://access.redhat.com/errata/RHSA-2025:10381
https://access.redhat.com/errata/RHSA-2025:10410
https://access.redhat.com/errata/RHSA-2025:9303
https://access.redhat.com/errata/RHSA-2025:9304
https://access.redhat.com/errata/RHSA-2025:9305
https://access.redhat.com/errata/RHSA-2025:9306
https://access.redhat.com/errata/RHSA-2025:9392
https://access.redhat.com/errata/RHSA-2025:9964
https://access.redhat.com/security/cve/CVE-2025-49179
https://bugzilla.redhat.com/show_bug.cgi?id=2369978
https://gitlab.freedesktop.org/xorg/xserver/-/commit/2bde9ca49a8fd9a1e6697d5e7ef837870d66f5d4
https://www.x.org/wiki/Development/Security/
https://lists.debian.org/debian-lts-announce/2025/06/msg00028.html