Improper locking in Linux kernel mm

1) Improper locking

EUVDB-ID: #VU94263

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-2024-40949

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 shmem_replace_folio() function in mm/shmem.c, within the __mem_cgroup_uncharge_folios() function in mm/memcontrol.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: before

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/8c6c3719ebb7913f8a665d11816d2e38b0eadbab
https://git.kernel.org/stable/c/9094b4a1c76cfe84b906cc152bab34d4ba26fa5c
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.10

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.