Processor Vulnerability Affecting AMD CPU in Linux Kernel

CVE-2026-99099

What is CVE-2026-99099?

An issue within the Linux kernel affects AMD processors, where the processor may not properly invalidate a Translation Lookaside Buffer (TLB) entry during the execution of the INVLPGB/TLBSYNC instruction pair. This inconsistency can lead to improper management of memory translations, potentially causing unauthorized access to sensitive data. A software workaround has been developed to detect this erratum when no microcode fix is available, ensuring the integrity of memory operations.

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