CVE-2023-20593
An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information.
- Published
- Jul 24, 2023
- Updated
- Feb 13, 2025
- Assigning CNA
- AMD
- Evidence observed
- Sep 21, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NLow · next 30 days
- Percentile
- 92.1%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information.
Sources
1- LoongBleedPoC
Proof-of-concept demonstrating a microarchitectural data leak in Loongson LA464/LA664 processors via undefined upper bits of LASX vector registers, similar to ZenBleed.
Responsible use
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