7.8
CWE
362
Advisory Published
Updated

CVE-2023-46813: Race Condition

First published: Fri Oct 27 2023(Updated: )

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.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<6.5.9
IBM QRadar SIEM<=7.5 - 7.5.0 UP8 IF01
debian/linux
5.10.223-1
5.10.226-1
6.1.106-3
6.1.112-1
6.11.4-1
6.11.5-1

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the CVE ID for this vulnerability?

    The CVE ID for this vulnerability is CVE-2023-46813.

  • What is the severity of CVE-2023-46813?

    The severity of CVE-2023-46813 is high with a severity value of 7.

  • How does CVE-2023-46813 affect Linux kernel?

    CVE-2023-46813 affects Linux kernel versions before 6.5.9.

  • What is the vulnerability description for CVE-2023-46813?

    CVE-2023-46813 is a vulnerability in the Linux kernel that allows local users with userspace access to MMIO registers to gain arbitrary write access to kernel memory.

  • How can I fix CVE-2023-46813?

    To fix CVE-2023-46813, update your Linux kernel to version 6.5.9 or later.

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