CVE-2025-49175
published 2025-06-17CVE-2025-49175: A flaw was found in the X Rendering extension's handling of animated cursors. If a client provides no cursors, the server assumes at least one is present…
PriorityP426medium6.1CVSS 3.1
AVLACLPRLUINSUCLINAH
EPSS
0.29%
20.9th percentile
A flaw was found in the X Rendering extension's handling of animated cursors. If a client provides no cursors, the server assumes at least one is present, leading to an out-of-bounds read and potential crash.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | xorg-server | < xorg-server 2:21.1.7-3+deb12u10 (bookworm) | xorg-server 2:21.1.7-3+deb12u10 (bookworm) |
| debian | xwayland | < xorg-server 2:21.1.7-3+deb12u10 (bookworm) | xorg-server 2:21.1.7-3+deb12u10 (bookworm) |
| msrc | azl3_wayland_1.22.0-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_xorg-x11-server-xwayland_24.1.6-2_on_azure_linux_3.0 | — | — |
| msrc | cbl2_xorg-x11-server_1.20.10-16_on_cbl_mariner_2.0 | — | — |
| x.org | xorg-server | >= 0 < 2:1.20.11-1+deb11u16 | 2:1.20.11-1+deb11u16 |
| x.org | xorg-server | >= 0 < 2:21.1.7-3+deb12u10 | 2:21.1.7-3+deb12u10 |
| x.org | xorg-server | >= 0 < 2:21.1.16-1.2 | 2:21.1.16-1.2 |
| x.org | xorg-server | >= 0 < 2:21.1.16-1.2 | 2:21.1.16-1.2 |
| x.org | xwayland | < 24.1.8 | 24.1.8 |
| x.org | xwayland | >= 0 < 2:24.1.8-1 | 2:24.1.8-1 |
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
osv6.1MEDIUM
vendor_debian6.1MEDIUM
vendor_redhat6.1MEDIUM
vendor_msrc5.5MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Ubuntu
X.Org X Server vulnerabilities
vendor_ubuntu·2025-06-18
CVE-2025-49179 X.Org X Server vulnerabilities
Title: X.Org X Server vulnerabilities
Summary: Several security issues were fixed in X.Org X Server.
USN-7573-1 fixed several vulnerabilities in X.Org. This update provides
the corresponding update for Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu
20.04 LTS.
Original advisory details:
Nils Emmerich discovered that the X.Org X Server incorrectly handled
certain memory operations. An attacker could use these issues to cause the
X Server to crash, leading to a denial of service, obtain sensitive
information, or possibly execute arbitrary code.
Instructions: After a standard system update you need to reboot your computer to make all
the necessary changes.
Ubuntu
X.Org X Server vulnerabilities
vendor_ubuntu·2025-06-17
CVE-2025-49176 X.Org X Server vulnerabilities
Title: X.Org X Server vulnerabilities
Summary: Several security issues were fixed in X.Org X Server.
Nils Emmerich discovered that the X.Org X Server incorrectly handled
certain memory operations. An attacker could use these issues to cause the
X Server to crash, leading to a denial of service, obtain sensitive
information, or possibly execute arbitrary code.
Instructions: After a standard system update you need to reboot your computer to make all
the necessary changes.
Red Hat
xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Out-of-Bounds Read in X Rendering Extension Animated Cursors
vendor_redhat·2025-06-17·CVSS 6.1
CVE-2025-49175 [MEDIUM] CWE-125 xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Out-of-Bounds Read in X Rendering Extension Animated Cursors
xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Out-of-Bounds Read in X Rendering Extension Animated Cursors
A flaw was found in the X Rendering extension's handling of animated cursors. If a client provides no cursors, the server assumes at least one is present, leading to an out-of-bounds read and potential crash.
A flaw was found in the X Rendering extension's handling of animated cursors. If a client provides no cursors, the server assumes at least one is present, leading to an out-of-bounds read and potential crash.
Statement: This vulnerability is rated as an important severity because the flaw exists in the X Rendering extension of the X.Org X server, specifically in the handling of animated cursors, when a client request provides zero cursors, the server erroneously assumes
Microsoft
Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: out-of-bounds read in x rendering extension animated cursors
vendor_msrc·2025-06-10·CVSS 5.5
CVE-2025-49175 [MEDIUM] CWE-125 Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: out-of-bounds read in x rendering extension animated cursors
Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: out-of-bounds read in x rendering extension animated cursors
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
redhat: redhat
Customer Action Required: Yes
Debian
CVE-2025-49175: xorg-server - A flaw was found in the X Rendering extension's handling of animated cursors. If...
vendor_debian·2025·CVSS 6.1
CVE-2025-49175 [MEDIUM] CVE-2025-49175: xorg-server - A flaw was found in the X Rendering extension's handling of animated cursors. If...
A flaw was found in the X Rendering extension's handling of animated cursors. If a client provides no cursors, the server assumes at least one is present, leading to an out-of-bounds read and potential crash.
Scope: local
bookworm: resolved (fixed in 2:21.1.7-3+deb12u10)
bullseye: resolved (fixed in 2:1.20.11-1+deb11u16)
forky: resolved (fixed in 2:21.1.16-1.2)
sid: resolved (fixed in 2:21.1.16-1.2)
trixie: resolved (fixed in 2:21.1.16-1.2)
GHSA
GHSA-2w2m-wpx9-m69r: A flaw was found in the X Rendering extension's handling of animated cursors
ghsa_unreviewed·2025-06-17
CVE-2025-49175 [MEDIUM] CWE-125 GHSA-2w2m-wpx9-m69r: A flaw was found in the X Rendering extension's handling of animated cursors
A flaw was found in the X Rendering extension's handling of animated cursors. If a client provides no cursors, the server assumes at least one is present, leading to an out-of-bounds read and potential crash.
OSV
CVE-2025-49175: A flaw was found in the X Rendering extension's handling of animated cursors
osv·2025-06-17·CVSS 6.1
CVE-2025-49175 [MEDIUM] CVE-2025-49175: A flaw was found in the X Rendering extension's handling of animated cursors
A flaw was found in the X Rendering extension's handling of animated cursors. If a client provides no cursors, the server assumes at least one is present, leading to an out-of-bounds read and potential crash.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://access.redhat.com/errata/RHSA-2025:10258https://access.redhat.com/errata/RHSA-2025:10342https://access.redhat.com/errata/RHSA-2025:10343https://access.redhat.com/errata/RHSA-2025:10344https://access.redhat.com/errata/RHSA-2025:10346https://access.redhat.com/errata/RHSA-2025:10347https://access.redhat.com/errata/RHSA-2025:10348https://access.redhat.com/errata/RHSA-2025:10349https://access.redhat.com/errata/RHSA-2025:10350https://access.redhat.com/errata/RHSA-2025:10351https://access.redhat.com/errata/RHSA-2025:10352https://access.redhat.com/errata/RHSA-2025:10355https://access.redhat.com/errata/RHSA-2025:10356https://access.redhat.com/errata/RHSA-2025:10360https://access.redhat.com/errata/RHSA-2025:10370https://access.redhat.com/errata/RHSA-2025:10374https://access.redhat.com/errata/RHSA-2025:10375https://access.redhat.com/errata/RHSA-2025:10376https://access.redhat.com/errata/RHSA-2025:10377https://access.redhat.com/errata/RHSA-2025:10378https://access.redhat.com/errata/RHSA-2025:10381https://access.redhat.com/errata/RHSA-2025:10410https://access.redhat.com/errata/RHSA-2025:9303https://access.redhat.com/errata/RHSA-2025:9304https://access.redhat.com/errata/RHSA-2025:9305https://access.redhat.com/errata/RHSA-2025:9306https://access.redhat.com/errata/RHSA-2025:9392https://access.redhat.com/errata/RHSA-2025:9964https://access.redhat.com/security/cve/CVE-2025-49175https://bugzilla.redhat.com/show_bug.cgi?id=2369947https://gitlab.freedesktop.org/xorg/xserver/-/commit/0885e0b26225c90534642fe911632ec0779eebeehttps://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2024https://www.x.org/wiki/Development/Security/https://lists.debian.org/debian-lts-announce/2025/06/msg00028.html
2025-06-17
Published