CVE-2023-30456 Missing authorization in n/a

What is CVE-2023-30456?

CVE-2023-30456 is a medium-severity missing authorization vulnerability in Linux kernel, published on 10 Apr 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.

Weakness: CWE-754

Which versions are affected by CVE-2023-30456?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-30456?

Apply the vendor's patch.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2023-30456 being exploited?

There is no known exploitation of CVE-2023-30456 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-26046, DEBIAN-CVE-2023-30456, GHSA-88gp-69jr-39m4, UBUNTU-CVE-2023-30456.