| CVE identifier | CVE-2023-23583 |
|---|---|
| Date discovered | 2023 |
| Affected hardware | Alder Lake,Raptor Lake,Sapphire Rapids |
Reptar is aCPU vulnerability discovered in late 2023, affecting a number of recent families ofIntel x86 CPUs. According toThe Register, the following CPU families are vulnerable:Alder Lake,Raptor Lake andSapphire Rapids.[1]
The Reptar vulnerability relates to processing ofx86instruction prefixes in ways that lead to unexpected behavior. It was discovered by Google's security team.[2][3] The vulnerability can be exploited in a number of ways, potentially leading toinformation leakage,denial of service, orprivilege escalation.[4][5]
It has been assigned theCVE ID CVE-2023-23583.[5] Intel have released new microcode in anout-of-band patch to mitigate the vulnerability, which it calls "redundant prefix".[1][6]
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