Ubuntu update for xorg-server



Risk Low
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2025-49180
CVE-2025-49179
CVE-2025-49178
CVE-2025-49176
CVE-2025-49175
CWE-ID CWE-190
CWE-399
CWE-125
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

xorg-server (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Integer overflow

EUVDB-ID: #VU111231

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-49180

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow within the RRChangeProviderProperty() function in RandR extension. A local user can trigger an integer overflow and execute arbitrary code with elevated privileges. 

Mitigation

Update the affected package xorg-server to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

xorg-server (Ubuntu package): before 2:1.18.4-0ubuntu0.12+esm18

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7573-2


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Integer overflow

EUVDB-ID: #VU111230

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-49179

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow within the RecordSanityCheckRegisterClients() function in in X Record extension. A local user can trigger an integer overflow and execute arbitrary code with elevated privileges. 

Mitigation

Update the affected package xorg-server to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

xorg-server (Ubuntu package): before 2:1.18.4-0ubuntu0.12+esm18

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7573-2


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Resource management error

EUVDB-ID: #VU111229

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-49178

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources within the application when handling client requests. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package xorg-server to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

xorg-server (Ubuntu package): before 2:1.18.4-0ubuntu0.12+esm18

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7573-2


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Integer overflow

EUVDB-ID: #VU111227

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-49176

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow in Big Requests Extension. A local user can trigger an integer overflow and execute arbitrary code with elevated privileges.


Mitigation

Update the affected package xorg-server to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

xorg-server (Ubuntu package): before 2:1.18.4-0ubuntu0.12+esm18

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7573-2


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Out-of-bounds read

EUVDB-ID: #VU111226

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-49175

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a boundary condition in X Rendering extension (Animated cursors). A local user can trigger an out-of-bounds read error and read contents of memory on the system.

Mitigation

Update the affected package xorg-server to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

xorg-server (Ubuntu package): before 2:1.18.4-0ubuntu0.12+esm18

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7573-2


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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