#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: 6.6 - 6.6.17, 6.7 - 6.7.5, 6.8 rc1 - 6.8 rc5

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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
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.18
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7.6
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.8

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?