CVSS 3.1 Score 9.8 of 10 (high)


Published Dec 4, 2023
Updated: Dec 22, 2023


CVE-2023-21218 is a critical vulnerability that affects the kernel in Linux operating systems. It is caused by an incorrect bounds check in PMRChangeSparseMemOSMem of physmem_osmem_linux.c, which can lead to an out of bounds write. Exploitation of this vulnerability does not require user interaction and can result in local escalation of privilege in the kernel. The base severity score is 9.8 out of 10, indicating the high potential danger it poses to organizations. To remediate this vulnerability, affected systems should be updated with the latest security patches provided by the Linux vendor.


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