CVE-2023-30456

MEDIUMNVD 6.57.8▲

6.5

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.

CVSS v3: 6.5
EG Score: 7.8(medium)
EPSS: 7.0%
KEV: Not listed

Published

April 10, 2023

Last Modified

March 19, 2025

References (12)

cve@mitrehttp://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html
cve@mitrehttps://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.8
cve@mitrehttps://github.com/torvalds/linux/commit/112e66017bff7f2837030f34c2bc19501e9212d5
cve@mitrehttps://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
cve@mitrehttps://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
cve@mitrehttps://security.netapp.com/advisory/ntap-20230511-0007/
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html
af854a3a-2127-422b-91ae-364da2661108https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.8
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/112e66017bff7f2837030f34c2bc19501e9212d5
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20230511-0007/

Patch Availability(22)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-tools-aws-hwe (4.15.0.1157.140) @ xenial	2026-05-25	ubuntu
ubuntu	linux-cloud-tools-6.2.0-23 (6.2.0-23.23) @ lunar	2026-05-25	ubuntu
ubuntu	linux-headers-azure-fde (5.15.0.1039.46.16) @ jammy	2026-05-25	ubuntu
ubuntu	linux-image-lowlatency (5.4.0.150.148) @ focal	2026-05-25	ubuntu
ubuntu	linux-tools-5.15.0-1031-intel-iotg (5.15.0-1031.36~20.04.1) @ focal	2026-05-25	ubuntu
ubuntu	linux-buildinfo-6.2.0-1007-gcp (6.2.0-1007.7) @ lunar	2026-05-25	ubuntu
ubuntu	linux-image-unsigned-4.4.0-241-lowlatency (4.4.0-241.275) @ xenial	2026-05-25	ubuntu
ubuntu	linux-headers-bluefield (5.4.0.1064.59) @ focal	2026-05-25	ubuntu
ubuntu	linux-headers-5.4.0-1024-xilinx-zynqmp (5.4.0-1024.28) @ focal	2026-05-25	ubuntu
ubuntu	linux-tools-5.15.0-1031-intel-iotg (5.15.0-1031.36) @ jammy	2026-05-25	ubuntu
ubuntu	linux-virtual (3.13.0.197.207) @ trusty	2026-05-25	ubuntu
ubuntu	lowlatency-4.4 (4.4.0-168) @ xenial	2026-05-25	ubuntu
ubuntu	linux-tools-iot (5.4.0.1017.15) @ focal	2026-05-25	ubuntu
ubuntu	linux-tools-oem-22.04c (6.1.0.1009.9) @ jammy	2026-05-25	ubuntu
ubuntu	linux-oem-22.04a (5.17.0.1032.30) @ jammy	2026-05-25	ubuntu
ubuntu	linux-modules-iwlwifi-oem-22.04b (6.0.0.1017.17) @ jammy	2026-05-25	ubuntu
ubuntu	linux-headers-5.15.0-73-generic-64k (5.15.0-73.80) @ jammy	2026-05-25	ubuntu
redhat	kernel-0:4.18.0-477.51.1.el8_8	2024-03-19	redhat
redhat	kernel-0:4.18.0-372.93.1.el8_6	2024-02-21	redhat
redhat	kernel-rt-0:4.18.0-513.5.1.rt7.307.el8_9	2023-11-14	redhat
redhat	kernel-0:4.18.0-513.5.1.el8_9	2023-11-14	redhat
redhat	kernel-0:5.14.0-362.8.1.el9_3	2023-11-07	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-754

All Vendor Advisories

(23)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 03:31 UTCEG score recompute

Frequently asked(5)

What is CVE-2023-30456?

CVE-2023-30456 is a medium vulnerability published on April 10, 2023. 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.

When was CVE-2023-30456 disclosed?

CVE-2023-30456 was first published in the National Vulnerability Database on April 10, 2023, with the most recent update on March 19, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-30456 actively exploited?

CVE-2023-30456 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-30456?

CVE-2023-30456 has a CVSS v3 base score of 6.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.8.

How do I remediate CVE-2023-30456?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-30456, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-30456

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