Ubuntu update for linux

Published: 2025-04-09

Risk	Medium
Patch available	YES
Number of vulnerabilities	21
CVE-ID	CVE-2025-21702 CVE-2024-53227 CVE-2024-46826 CVE-2024-49952 CVE-2024-56600 CVE-2021-47235 CVE-2024-50265 CVE-2021-47119 CVE-2024-53165 CVE-2021-47483 CVE-2024-50302 CVE-2024-56595 CVE-2024-50167 CVE-2024-56658 CVE-2024-49948 CVE-2024-26921 CVE-2021-47602 CVE-2024-26863 CVE-2021-47320 CVE-2025-21700 CVE-2021-47122
CWE-ID	CWE-399 CWE-416 CWE-20 CWE-119 CWE-401 CWE-415 CWE-125 CWE-191 CWE-908
Exploitation vector	Local
Public exploit	Vulnerability #11 is being exploited in the wild.
Vulnerable software	Ubuntu Operating systems & Components / Operating system linux-image-4.4.0-1142-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-267-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-267-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1180-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1143-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-virtual-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-virtual (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 21 vulnerabilities.

1) Resource management error

EUVDB-ID: #VU104074

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:U/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21702

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 resource management error within the pfifo_tail_enqueue() function in net/sched/sch_fifo.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: 14.04 - 16.04

linux-image-4.4.0-1142-aws (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-267-lowlatency (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-267-generic (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-1180-aws (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-1143-kvm (Ubuntu package): before Ubuntu Pro

linux-image-virtual-lts-xenial (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-lowlatency-lts-xenial (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-generic-lts-xenial (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-lowlatency (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-kvm (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-generic (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-aws (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-virtual (Ubuntu package): before Ubuntu Pro (Infra-only)

CPE2.3

External links

https://ubuntu.com/security/notices/USN-7429-1

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.

2) Use-after-free

EUVDB-ID: #VU102067

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-2024-53227

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the bfad_init() function in drivers/scsi/bfa/bfad.c. A local user can escalate privileges on the system.