CVE-2023-46813

HIGHNVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2023-10-27. NVD baseline CVSS 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.0Exploit: NoneExposed: 0

A fix is available — apply it.

An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege escalation). This depends on a race condition through which userspace can replace an instruction before the #VC handler reads it.

CVSS v3
7.0
EG Score
7.0(medium)
EG Risk
—
EPSS
49.1%
KEV
Not listed

Published

October 27, 2023

Last Modified

June 17, 2026

References (12)

Vendor Advisories for CVE-2023-46813(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(17)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oem-22.04c (6.1.0.1027.28) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.94.91) @ jammy2026-05-24ubuntu
ubuntulinux-tools-intel-iotg (5.15.0.1047.47) @ jammy2026-05-24ubuntu
ubuntulinux-tools-azure (6.5.0.1015.17) @ mantic2026-05-24ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1046.44) @ jammy2026-05-24ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1056.52) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.5.0.17.19) @ mantic2026-05-24ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1048.54~20.04.38) @ focal2026-05-24ubuntu
redhatkernel-0:4.18.0-513.18.1.el8_92024-02-20redhat
redhatkernel-rt-0:4.18.0-513.18.1.rt7.320.el8_92024-02-20redhat
redhatkernel-0:4.18.0-372.91.1.el8_62024-02-07redhat
redhatkernel-0:4.18.0-477.43.1.el8_82024-01-30redhat
redhatkernel-rt-0:5.14.0-70.85.1.rt21.156.el9_02024-01-25redhat
redhatkernel-0:5.14.0-284.48.1.el9_22024-01-25redhat
redhatkernel-rt-0:5.14.0-284.48.1.rt14.333.el9_22024-01-25redhat
redhatkernel-0:5.14.0-70.85.1.el9_02024-01-25redhat
redhatkernel-0:5.14.0-362.18.1.el9_32024-01-25redhat

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.

Additional Vendor Advisories

(14)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 104 total refreshes for this CVE.

  1. 2026-07-22 23:14 UTCEG score recompute
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Frequently asked(5)

What is CVE-2023-46813?
CVE-2023-46813 is a high vulnerability published on October 27, 2023. An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and…
When was CVE-2023-46813 disclosed?
CVE-2023-46813 was first published in the National Vulnerability Database on October 27, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-46813 actively exploited?
CVE-2023-46813 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 49.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-46813?
CVE-2023-46813 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2023-46813?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-46813, 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.

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