Description
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.
Published: 2023-10-27
Score: 7.0 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Debian DLA Debian DLA DLA-3711-1 linux-5.10 security update
Debian DSA Debian DSA DSA-5594-1 linux security update
Ubuntu USN Ubuntu USN USN-6533-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6624-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6626-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6626-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6626-3 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-6628-1 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-6628-2 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-6652-1 Linux kernel (Azure) vulnerabilities
History

Thu, 26 Feb 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Subscriptions

Linux Linux Kernel
Redhat Enterprise Linux Rhel Eus Rhev Hypervisor
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-02-25T17:20:12.134Z

Reserved: 2023-10-27T00:00:00.000Z

Link: CVE-2023-46813

cve-icon Vulnrichment

Updated: 2024-08-02T20:53:21.700Z

cve-icon NVD

Status : Modified

Published: 2023-10-27T03:15:08.270

Modified: 2026-02-25T18:18:23.163

Link: CVE-2023-46813

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-10-27T00:00:00Z

Links: CVE-2023-46813 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses