CVE-2025-49177

Publication date 17 June 2025

Last updated 1 July 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.1 · Medium

Score breakdown

Description

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
xorg-server 25.10 questing
Fixed 2:21.1.18-1ubuntu1
25.04 plucky
Fixed 2:21.1.16-1ubuntu1.1
24.10 oracular
Fixed 2:21.1.13-2ubuntu1.4
24.04 LTS noble
Fixed 2:21.1.12-1ubuntu1.4
22.04 LTS jammy
Fixed 2:21.1.4-2ubuntu1.7~22.04.15
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation
xwayland 25.10 questing
Fixed 2:24.1.6-1ubuntu1
25.04 plucky
Fixed 2:24.1.6-1ubuntu0.1
24.10 oracular
Fixed 2:24.1.2-1ubuntu0.6
24.04 LTS noble
Fixed 2:23.2.6-1ubuntu0.6
22.04 LTS jammy
Fixed 2:22.1.1-1ubuntu0.19
xorg 25.10 questing
Not affected
25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
xorg-server-hwe-16.04 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
16.04 LTS xenial
Needs evaluation
xorg-server-hwe-18.04 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Needs evaluation
xorg-hwe-16.04 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
16.04 LTS xenial
Not affected
xorg-hwe-18.04 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Not affected

Notes

mdeslaur

xorg server is actually the xorg-server package the xorg package only contains docs xwayland package contains parts of xorg-server

Severity score breakdown

Parameter Value
Base score 6.1 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L

References

Related Ubuntu Security Notices (USN)

    • USN-7573-1
    • X.Org X Server vulnerabilities
    • 17 June 2025

Other references