CVE-2024-36953
Published: June 4, 2024Last modified: June 4, 2024
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 4.4 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | HIGH |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.91-r0) |
| Stream | linux-lts | Fixed (6.6.58-r0) |
References
- https://git.kernel.org/stable/c/01981276d64e542c177b243f7c979fee855d5487
- https://git.kernel.org/stable/c/17db92da8be5dd3bf63c01f4109fe47db64fc66f
- https://git.kernel.org/stable/c/3a5b0378ac6776c7c31b18e0f3c1389bd6005e80
- https://git.kernel.org/stable/c/4404465a1bee3607ad90a4c5f9e16dfd75b85728
- https://git.kernel.org/stable/c/6ddb4f372fc63210034b903d96ebbeb3c7195adb
- https://git.kernel.org/stable/c/8d6a1c8e3de36cb0f5e866f1a582b00939e23104
- https://lists.debian.org/debian-lts-announce/2024/06/msg00019.html