Improper locking in Linux kernel

1) Improper locking

EUVDB-ID: #VU102171

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-2024-56559

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

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

The vulnerability exists due to improper locking within the decay_va_pool_node() and purge_vmap_node() functions in mm/vmalloc.c, within the kasan_depopulate_vmalloc_pte() and kasan_release_vmalloc() functions in mm/kasan/shadow.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12 - 6.12.3

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.12:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.3:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/9e9e085effe9b7e342138fde3cf8577d22509932
https://git.kernel.org/stable/c/f9a18889aad9b4c19c6c4550c67ad4f9ed2a354f
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.4

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.