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.
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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

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

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