What’s Vulnerable › Vulnerabilities

CVE-2023-20569

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 7.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-08-08 · updated 2026-06-17
• Weakness: CWE-203

Description

A side channel vulnerability on some of the AMD CPUs may allow an attacker to influence the return address prediction. This may result in speculative execution at an attacker-controlled address, potentially leading to information disclosure.

Affected products

• AMD Epyc 72F3 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7313 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7313P Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7343 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7373X Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 73F3 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7413 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7443 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7443P Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7453 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7473X Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 74F3 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7513 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7543 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7543P Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7573X Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 75F3 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7643 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7663 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7713 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7713P Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7763 Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 7773X Firmware: before milanpi_1.0.0.c — fixed in milanpi_1.0.0.c
• AMD Epyc 9124 Firmware: before genoapi_1.0.0.9 — fixed in genoapi_1.0.0.9
• AMD Epyc 9174F Firmware: before genoapi_1.0.0.9 — fixed in genoapi_1.0.0.9
• AMD Epyc 9184X Firmware: before genoapi_1.0.0.9 — fixed in genoapi_1.0.0.9
• AMD Epyc 9224 Firmware: before genoapi_1.0.0.9 — fixed in genoapi_1.0.0.9
• AMD Epyc 9254 Firmware: before genoapi_1.0.0.9 — fixed in genoapi_1.0.0.9
• AMD Epyc 9274F Firmware: before genoapi_1.0.0.9 — fixed in genoapi_1.0.0.9
• AMD Epyc 9334 Firmware: before genoapi_1.0.0.9 — fixed in genoapi_1.0.0.9

How to fix

Upgrade to a fixed version: AMD Epyc 72F3 Firmware milanpi_1.0.0.c; AMD Epyc 7313 Firmware milanpi_1.0.0.c; AMD Epyc 7313P Firmware milanpi_1.0.0.c; AMD Epyc 7343 Firmware milanpi_1.0.0.c; AMD Epyc 7373X Firmware milanpi_1.0.0.c; AMD Epyc 73F3 Firmware milanpi_1.0.0.c; AMD Epyc 7413 Firmware milanpi_1.0.0.c; AMD Epyc 7443 Firmware milanpi_1.0.0.c; AMD Epyc 7443P Firmware milanpi_1.0.0.c; AMD Epyc 7453 Firmware milanpi_1.0.0.c; AMD Epyc 7473X Firmware milanpi_1.0.0.c; AMD Epyc 74F3 Firmware milanpi_1.0.0.c. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2023/08/08/4
• http://xenbits.xen.org/xsa/advisory-434.html
• https://comsec.ethz.ch/research/microarch/inception/
• https://lists.debian.org/debian-lts-announce/2023/08/msg00013.html
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HKKYIK2EASDNUV4I7EFJKNBVO3KCKGRR/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L4E4TZNMLYL2KETY23IPA43QXFAVJ46V/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PKK3IA63LSKM4EC3TN4UM6DDEIOWEQIG/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T7WO5JM74YJSYAE5RBV4DC6A4YLEKWLF/
• https://security.netapp.com/advisory/ntap-20240605-0006/
• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7005
• https://www.debian.org/security/2023/dsa-5475
• http://www.openwall.com/lists/oss-security/2023/08/08/4

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