CVE-2024-36953

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

Description

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.

4.4

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.09%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/4404465a1bee3607ad90a4c5f9e16dfd75b85728
https://git.kernel.org/stable/c/17db92da8be5dd3bf63c01f4109fe47db64fc66f
https://git.kernel.org/stable/c/3a5b0378ac6776c7c31b18e0f3c1389bd6005e80
https://git.kernel.org/stable/c/8d6a1c8e3de36cb0f5e866f1a582b00939e23104
https://git.kernel.org/stable/c/01981276d64e542c177b243f7c979fee855d5487
https://git.kernel.org/stable/c/6ddb4f372fc63210034b903d96ebbeb3c7195adb
https://lists.debian.org/debian-lts-announce/2024/06/msg00019.html

Frequently Asked Questions

What is the severity of CVE-2024-36953?: CVE-2024-36953 has been scored as a medium severity vulnerability.
How to fix CVE-2024-36953?: To fix CVE-2024-36953, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-36953 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2024-36953 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-36953?: CVE-2024-36953 affects Linux Linux, Linux Linux.

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