What is CVE-2026-64229?
A vulnerability in the Linux kernel's x86/mm subsystem where broadcast TLB flushing remains enabled on AMD CPUs with INVLPGB support when booted with 'nopcid', which disables PCID. This can lead to unexpected behavior and requires a kernel update to resolve.
Azərbaycanca: Linux kernel-də x86/mm alt sistemində aşkar edilmiş boşluqdur. 'nopcid' parametresi ilə yükləmə zamanı PCID deaktiv edildikdə, AMD prosessorlarında INVLPGB dəstəyi ilə broadcast TLB flush aktiv qalır ki, bu da gözlənilməz davranışa səbəb ola bilər. Bu problemi aradan qaldırmaq üçün kernel yenilənməlidir.
FAQ2
On which CPUs can the CVE-2026-64229 vulnerability remain active in a Linux kernel booted with the 'nopcid' parameter?
This vulnerability causes broadcast TLB flushing to remain enabled on AMD CPUs with INVLPGB support when booted with the 'nopcid' parameter, which disables PCID.
What action is required to resolve the CVE-2026-64229 vulnerability?
A kernel update is required to resolve this issue.
See also6
This explainer is AI-written from source data — skopnix's own reporting on this CVE; CVSS scores, vendors and versions are never invented. See NVD for the official record.