What’s Vulnerable › Vulnerabilities
CVE-2023-30456
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-04-10 · updated 2026-06-17
- Weakness: CWE-754
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.
Affected products
- Linux kernel: before 6.2.8; 6.3-rc1, 6.3-rc2 — fixed in 6.2.8
How to fix
Upgrade to a fixed version: Linux kernel 6.2.8. Check the vendor advisory for mitigations.
References
- http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.8
- https://github.com/torvalds/linux/commit/112e66017bff7f2837030f34c2bc19501e9212d5
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
- https://security.netapp.com/advisory/ntap-20230511-0007/
- http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.8
- https://github.com/torvalds/linux/commit/112e66017bff7f2837030f34c2bc19501e9212d5
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
- https://security.netapp.com/advisory/ntap-20230511-0007/
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