CVE-2023-46813 Race condition in n/a

What is CVE-2023-46813?

CVE-2023-46813 is a high-severity vulnerability in Linux kernel, published on 27 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Which versions are affected by CVE-2023-46813?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-46813?

Apply the vendor's patch.

Is CVE-2023-46813 being exploited?

There is no known exploitation of CVE-2023-46813 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-31815, AZL-34802, BELL-CVE-2023-46813, DEBIAN-CVE-2023-46813, GHSA-w26h-mgrc-mcqq, UBUNTU-CVE-2023-46813 and 1 more.