#VU87191 Permissions, Privileges, and Access Controls in Linux kernel - CVE-2024-25744

Vulnerability identifier: #VU87191

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-2024-25744

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

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

Vendor:

Description

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

The vulnerability exists due to missing access restrictions related to arch/x86/coco/tdx/tdx.c and arch/x86/mm/mem_encrypt_amd.c. An untrusted VMM can trigger int80 syscall handling at any given point and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b82a8dbd3d2f4563156f7150c6f2ecab6e960b30
http://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.7

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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.