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.

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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
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

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'}


Projects

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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