#VU91532 Improper locking in Linux kernel - CVE-2024-26691

Vulnerability identifier: #VU91532

Vulnerability 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-2024-26691

CWE-ID: CWE-667

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to improper locking within the kvm_hyp_reserve(), __pkvm_create_hyp_vm() and pkvm_create_hyp_vm() functions in arch/arm64/kvm/pkvm.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

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External links
https://git.kernel.org/stable/c/3d16cebf01127f459dcfeb79ed77bd68b124c228
https://git.kernel.org/stable/c/3ab1c40a1e915e350d9181a4603af393141970cc
https://git.kernel.org/stable/c/10c02aad111df02088d1a81792a709f6a7eca6cc

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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.