DEBIAN-CVE-2026-64229

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Disable broadcast TLB flush when PCID is disabled Booting with "nopcid" clears X86FEATUREPCID and keeps CR4.PCIDE from being set to one. On AMD CPUs that support INVLPGB, broadcast TLB flushing remains enabled. There are...

CVE-2026-64229

Summary: CVE-2026-64229 affects the Linux kernel on x86 with regard to TLB broadcast invalidation and PCID. The issue arises in the global ASID handling path when INVLPGB (invalidations) is used with a non-zero PCID while CR4.PCIDE is not set, which could trigger a #GP (general protection fault) ...