X.org X11 Server up to 21.1.16 Data Structure dix/devices.c AttachDevice improper resource locking

Summaryinfo

A vulnerability categorized as problematic has been discovered in X.org X11 Server up to 21.1.16. Impacted is the function AttachDevice of the file dix/devices.c of the component Data Structure Handler. The manipulation results in improper resource locking. This vulnerability is reported as CVE-2022-49737. The attack can be launched remotely. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in X.org X11 Server up to 21.1.16. It has been classified as problematic. Affected is the function AttachDevice of the file dix/devices.c of the component Data Structure Handler. The manipulation with an unknown input leads to a improper resource locking vulnerability. CWE is classifying the issue as CWE-413. The product does not lock or does not correctly lock a resource when the product must have exclusive access to the resource. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In X.Org X server 20.11 through 21.1.16, when a client application uses easystroke for mouse gestures, the main thread modifies various data structures used by the input thread without acquiring a lock, aka a race condition. In particular, AttachDevice in dix/devices.c does not acquire an input lock.

The advisory is shared for download at bugs.debian.org. This vulnerability is traded as CVE-2022-49737 since 03/16/2025. The exploitability is told to be difficult. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 233208 (SUSE SLED15 / SLES15 / openSUSE 15 Security Update : xorg-x11-server (SUSE-SU-2025:0984-1)), which helps to determine the existence of the flaw in a target environment.

Applying the patch dc7cb45482cea6ccec22d117ca0b489500b4d0a0 is able to eliminate this problem. The bugfix is ready for download at gitlab.freedesktop.org.

The vulnerability is also documented in the vulnerability database at Tenable (233208). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Windowing System Software

Vendor

• X.org

Name

• X11 Server

Version

• 21.1.0
• 21.1.1
• 21.1.2
• 21.1.3
• 21.1.4
• 21.1.5
• 21.1.6
• 21.1.7
• 21.1.8
• 21.1.9
• 21.1.10
• 21.1.11
• 21.1.12
• 21.1.13
• 21.1.14
• 21.1.15
• 21.1.16

License

• open-source

Website

• Vendor: https://www.x.org/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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