Ubuntu update for linux-azure



Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2025-21953
CVE-2024-56653
CWE-ID CWE-476
CWE-416
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

linux-image-azure-lts-24.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-azure-fde-lts-24.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-6.8.0-1028-azure-fde (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-6.8.0-1028-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU106698

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-2025-21953

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to NULL pointer dereference within the mana_cleanup_port_context(), mana_destroy_eq(), mana_destroy_txq() and mana_destroy_rxq() functions in drivers/net/ethernet/microsoft/mana/mana_en.c, within the debugfs_remove_recursive(), mana_gd_remove(), mana_gd_shutdown(), mana_driver_init() and mana_driver_exit() functions in drivers/net/ethernet/microsoft/mana/gdma_main.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 24.04

linux-image-azure-lts-24.04 (Ubuntu package): before 6.8.0-1028.33

linux-image-azure-fde-lts-24.04 (Ubuntu package): before 6.8.0-1028.33

linux-image-6.8.0-1028-azure-fde (Ubuntu package): before 6.8.0-1028.33

linux-image-6.8.0-1028-azure (Ubuntu package): before 6.8.0-1028.33

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7500-1


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: #VU102032

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-2024-56653

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 btmtk_process_coredump() function in drivers/bluetooth/btmtk.c. A local user can escalate privileges on the system.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 24.04

linux-image-azure-lts-24.04 (Ubuntu package): before 6.8.0-1028.33

linux-image-azure-fde-lts-24.04 (Ubuntu package): before 6.8.0-1028.33

linux-image-6.8.0-1028-azure-fde (Ubuntu package): before 6.8.0-1028.33

linux-image-6.8.0-1028-azure (Ubuntu package): before 6.8.0-1028.33

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7500-1


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.



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