Ubuntu update for linux

1) Use of uninitialized resource

EUVDB-ID: #VU105154

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-2025-21813

CWE-ID: CWE-908 - Use of Uninitialized Resource

Exploit availability: No

Description

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

The vulnerability exists due to use of uninitialized resource within the tmigr_setup_groups() function in kernel/time/timer_migration.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 24.04 - 24.10

linux-image-virtual-hwe-24.04 (Ubuntu package): before 6.11.0-25.25~24.04.1

linux-image-lowlatency-hwe-24.04 (Ubuntu package): before 6.11.0-1013.14~24.04.1

linux-image-lowlatency-64k-hwe-24.04 (Ubuntu package): before 6.11.0-1013.14~24.04.1

linux-image-generic-hwe-24.04 (Ubuntu package): before 6.11.0-25.25~24.04.1

linux-image-generic-64k-hwe-24.04 (Ubuntu package): before 6.11.0-25.25~24.04.1

linux-image-virtual (Ubuntu package): before 6.11.0-25.25

linux-image-raspi (Ubuntu package): before 6.11.0-1012.12

linux-image-oracle-64k (Ubuntu package): before 6.11.0-1015.16

linux-image-oracle (Ubuntu package): before 6.11.0-1015.16

linux-image-lowlatency-64k (Ubuntu package): before 6.11.0-1013.14

linux-image-lowlatency (Ubuntu package): before 6.11.0-1013.14

linux-image-generic-64k (Ubuntu package): before 6.11.0-25.25

linux-image-generic (Ubuntu package): before 6.11.0-25.25

linux-image-gcp-64k (Ubuntu package): before 6.11.0-1014.14~24.04.1

linux-image-gcp (Ubuntu package): before 6.11.0-1014.14~24.04.1

linux-image-aws (Ubuntu package): before 6.11.0-1013.14

linux-image-6.11.0-25-generic-64k (Ubuntu package): before 6.11.0-25.25~24.04.1

linux-image-6.11.0-25-generic (Ubuntu package): before 6.11.0-25.25~24.04.1

linux-image-6.11.0-1015-oracle-64k (Ubuntu package): before 6.11.0-1015.16

linux-image-6.11.0-1015-oracle (Ubuntu package): before 6.11.0-1015.16

linux-image-6.11.0-1014-gcp-64k (Ubuntu package): before 6.11.0-1014.14~24.04.1

linux-image-6.11.0-1014-gcp (Ubuntu package): before 6.11.0-1014.14~24.04.1

linux-image-6.11.0-1013-lowlatency-64k (Ubuntu package): before 6.11.0-1013.14~24.04.1

linux-image-6.11.0-1013-lowlatency (Ubuntu package): before 6.11.0-1013.14~24.04.1

linux-image-6.11.0-1013-aws (Ubuntu package): before 6.11.0-1013.14

linux-image-6.11.0-1012-raspi (Ubuntu package): before 6.11.0-1012.12

CPE2.3

• cpe:2.3:o:canonical:ubuntu:24.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:24.10:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:linux-image-virtual-hwe-24.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-lowlatency-hwe-24.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-lowlatency-64k-hwe-24.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic-hwe-24.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic-64k-hwe-24.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-virtual_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-raspi_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-oracle-64k_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-oracle_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-lowlatency-64k_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-lowlatency_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic-64k_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-gcp-64k_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-gcp_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-aws_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-6_11_0-25-generic-64k_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-6_11_0-25-generic_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-6_11_0-1015-oracle-64k_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-6_11_0-1015-oracle_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-6_11_0-1014-gcp-64k_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-6_11_0-1014-gcp_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-6_11_0-1013-lowlatency-64k_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-6_11_0-1013-lowlatency_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-6_11_0-1013-aws_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-6_11_0-1012-raspi_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-7489-1

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.