CVE-2023-46813

Advisory lineage Upstream: 0 Downstream: 36
Modified
Published: 27 Oct 2023, 00:00
Last modified:25 Feb 2026, 17:20

Vulnerability Summary

Overall Risk (default)
medium
28/100
CVSS Score
7 HIGH
v3.1 (nvd)
EPSS Score
0.37% LOW
0% probability +0.09%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 Oct 2023, 00:00
Published
Vulnerability first disclosed
25 Feb 2026, 17:20
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.37%• Percentile: 59%

Affected Systems

  • linux•linux_kernel

    < 6.5.9

References (6)