CVE-2025-26597

Publication date 25 February 2025

Last updated 19 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.8 · High

Score breakdown

Description

A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size.

Read the notes from the security team

Status

Package Ubuntu Release Status
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 25.10 questing
Fixed 2:21.1.16-1ubuntu1
25.04 plucky
Fixed 2:21.1.16-1ubuntu1
24.10 oracular
Fixed 2:21.1.13-2ubuntu1.2
24.04 LTS noble
Fixed 2:21.1.12-1ubuntu1.2
22.04 LTS jammy
Fixed 2:21.1.4-2ubuntu1.7~22.04.13
20.04 LTS focal
Fixed 2:1.20.13-1ubuntu1~20.04.19
18.04 LTS bionic
Fixed 2:1.19.6-1ubuntu4.15+esm12
16.04 LTS xenial
Fixed 2:1.18.4-0ubuntu0.12+esm17
14.04 LTS trusty
Needs evaluation
xwayland 25.10 questing
Fixed 2:24.1.5-1ubuntu1
25.04 plucky
Fixed 2:24.1.5-1ubuntu1
24.10 oracular
Fixed 2:24.1.2-1ubuntu0.4
24.04 LTS noble
Fixed 2:23.2.6-1ubuntu0.4
22.04 LTS jammy
Fixed 2:22.1.1-1ubuntu0.17
20.04 LTS focal Not in release
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
20.04 LTS focal Not in release
16.04 LTS xenial
Fixed 2:1.19.6-1ubuntu4.1~16.04.6+esm9
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
20.04 LTS focal Not in release
18.04 LTS bionic
Fixed 2:1.20.8-2ubuntu2.2~18.04.11+esm4
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
20.04 LTS focal 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
20.04 LTS focal Not in release
18.04 LTS bionic
Not affected

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

References

Related Ubuntu Security Notices (USN)

    • USN-7299-1
    • X.Org X Server vulnerabilities
    • 25 February 2025
    • USN-7299-2
    • X.Org X Server vulnerabilities
    • 10 March 2025
    • USN-7299-4
    • X.Org X Server regression
    • 17 March 2025

Other references