CVE-2023-46813
low-risk
Published 2023-10-27
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.
Do I need to act?
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0.33% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.0/10
High
LOCAL
/ HIGH complexity
Affected Products (1)
Affected Vendors
References (12)
Issue Tracking
https://bugzilla.suse.com/show_bug.cgi?id=1212649
Issue Tracking
https://bugzilla.suse.com/show_bug.cgi?id=1212649
24
/ 100
low-risk
Severity
18/34 · Moderate
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal