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| CVE identifier(s) | CVE-2023-23583 |
|---|---|
| Date discovered | 2023 |
| Affected hardware | Alder Lake, Raptor Lake, Sapphire Rapids |
Reptar is a CPU vulnerability discovered in late 2023, affecting a number of recent families of Intel x86 CPUs. According to The Register, the following CPU families are vulnerable: Alder Lake, Raptor Lake and Sapphire Rapids.[1]
The Reptar vulnerability relates to processing of x86 instruction 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 to information leakage, denial of service, or privilege escalation.[4][5]
It has been assigned the CVE ID CVE-2023-23583.[5] Intel have released new microcode in an out-of-band patch to mitigate the vulnerability, which it calls "redundant prefix".[1][6]
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