Bugzilla – Bug 1225812
VUL-0: CVE-2024-36953: kernel: KVM: arm64: vgic-v2: Check for non-NULL vCPU in vgic_v2_parse_attr()
Last modified: 2024-06-04 09:23:27 UTC
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: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-36953 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-36953.mbox 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://www.cve.org/CVERecord?id=CVE-2024-36953
Wrong Fixes tag. The commit which introduces the issue is: --- commit 4e7728c81a54b17bd33be402ac140bc11bb0c4f4 Refs: v6.6-rc2-4-g4e7728c81a54 Author: Marc Zyngier <maz@kernel.org> CommitDate: Sat Sep 30 18:15:43 2023 +0000 KVM: arm64: vgic-v2: Use cpuid from userspace as vcpu_id ---- Which is not part of our kernels. Not affected. Back to security team.