Published Oct 26, 2026Sources checked Nov 10, 2026
7.8HIGHCVSS out of 10
What this means
Review the available evidence
CVE-2026-99099 and is rated High severity with a CVSS score of 7.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
CISA KEVNot listedBased on the latest collected catalog
EPSS0.1%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2026-99099?
In the Linux kernel, the following vulnerability has been resolved:
x86/CPU/AMD: Fix AMD TLBI Erratum #1718
The processor may fail to invalidate a TLB entry while executing an INVLPGB/TLBSYNC instruction pair.
Detect the erratum and apply a software workaround when a microcode fix is not present.