CVE-2023-46813

High

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.

Package Linux Kernel
Published 2023-10-27
Last modified 2026-02-25
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

7.0

out of 10
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

The following references provide additional information about CVE-2023-46813 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

4 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2023-46813?

    CVE-2023-46813 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 . CVE-2023-46813 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2023-46813?

    CVE-2023-46813 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2023-46813?

    No patch is currently available for CVE-2023-46813. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2023-46813 actively exploited?

    No — CVE-2023-46813 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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