Incorrect calculation in Linux kernel kvm mmu

1) Incorrect calculation

EUVDB-ID: #VU93760

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-26990

CWE-ID: CWE-682 - Incorrect Calculation

Exploit availability: No

Description

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

The vulnerability exists due to incorrect calculation within the kvm_tdp_mmu_try_split_huge_pages(), kvm_tdp_mmu_clear_dirty_slot() and clear_dirty_pt_masked() functions in arch/x86/kvm/mmu/tdp_mmu.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/cdf811a937471af2d1facdf8ae80e5e68096f1ed
http://git.kernel.org/stable/c/e20bff0f1b2de9cfe303dd35ff46470104a87404
http://git.kernel.org/stable/c/2673dfb591a359c75080dd5af3da484b89320d22

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.