CVE-2025-49177mediumCWE-200

CVE-2025-49177: medium-severity vulnerability in X.Org xwayland

Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: data leak in xfixes extension's xfixessetclientdisconnectmode

Published · Updated

Follow this CVE+ Monitor Red Hat Enterprise Linux+ Monitor Red Hat Enterprise Linux 9.4 Extended Update Support

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.1epss 0.4%
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
Affected products
Red Hat · Red Hat Enterprise Linux 10Red Hat · Red Hat Enterprise Linux 6Red Hat · Red Hat Enterprise Linux 7Red Hat · Red Hat Enterprise Linux 8Red Hat · Red Hat Enterprise Linux 9Red Hat · Red Hat Enterprise Linux 9.4 Extended Update SupportX.Org · xwayland
Related CVEs — X.Org xwayland

In the same product, most dangerous first.

CVE-2023-4911HIGHGlibc: buffer overflow in ld.so leading to privilege escalationEPSS 63.8%KEVCVE-2024-6387HIGHOpenssh: regresshion - race condition in ssh allows rce/dosEPSS 99.5%CVE-2024-3094CRITICALXz: malicious code in distributed sourceEPSS 90.9%CVE-2023-46847HIGHSquid: denial of service in http digest authenticationEPSS 78.5%CVE-2024-12084CRITICALRsync: heap buffer overflow in rsync due to improper checksum length handlingEPSS 72.5%CVE-2023-1183MEDIUMArbitrary file writeEPSS 64.9%