What’s Vulnerable › Vulnerabilities

CVE-2023-46813

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.

Affected products

How to fix

Upgrade to a fixed version: Linux kernel 6.5.9. Check the vendor advisory for mitigations.

References

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