CVE-2024-36953

MEDIUM4.4

KVM: arm64: vgic-v2: Check for non-NULL vCPU in vgic_v2_parse_attr()

Published May 30, 2024

Modified 8 months ago

Details

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: vgic-v2: Check for non-NULL vCPU in vgic_v2_parse_attr()

vgic_v2_parse_attr() is responsible for finding the vCPU that matches the user-provided CPUID, which (of course) may not be valid. If the ID is invalid, kvm_get_vcpu_by_id() returns NULL, which isn't handled gracefully.

Similar to the GICv3 uaccess flow, check that kvm_get_vcpu_by_id() actually returns something and fail the ioctl if not.

References

WEBhttps://git.kernel.org/stable/c/01981276d64e542c177b243f7c979fee855d5487 WEBhttps://git.kernel.org/stable/c/17db92da8be5dd3bf63c01f4109fe47db64fc66f WEBhttps://git.kernel.org/stable/c/3a5b0378ac6776c7c31b18e0f3c1389bd6005e80 WEBhttps://git.kernel.org/stable/c/4404465a1bee3607ad90a4c5f9e16dfd75b85728 WEBhttps://git.kernel.org/stable/c/6ddb4f372fc63210034b903d96ebbeb3c7195adb WEBhttps://git.kernel.org/stable/c/8d6a1c8e3de36cb0f5e866f1a582b00939e23104 WEBhttps://lists.debian.org/debian-lts-announce/2024/06/msg00019.html ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2024-36953

CVSS Analysis

CVSS v3.1

4.4

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

HighPR:H

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

4.4/CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Ecosystems

Timeline

PublishedMay 30, 2024

ModifiedMay 4, 2025

CVE-2024-36953 | Mondoo Vulnerability Intelligence