New Reptar CPU flaw impacts Intel desktop and server systems
14-Nov-23
With the most recent Alder Lake, Raptor Lake, and Sapphire Rapids microarchitectures as well as its desktop, server, mobile, and embedded CPUs, Intel has resolved a high-severity CPU vulnerability.
The vulnerability, known as a “Redundant Prefix Issue” and tagged as CVE-2023-23583, allows attackers to escalate privileges, get sensitive data, or cause a denial of service condition.
“Under certain microarchitectural conditions, Intel has identified cases where execution of an instruction (REP MOVSB) encoded with a redundant REX prefix may result in unpredictable system behavior resulting in a system crash/hang, or, in some limited scenarios, may allow escalation of privilege (EoP) from CPL3 to CPL0,” said Intel.
