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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-20569
• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7005
• http://www.openwall.com/lists/oss-security/2023/08/08/4
• http://xenbits.xen.org/xsa/advisory-434.html
• https://lists.debian.org/debian-lts-announce/2023/08/msg00013.html
• https://www.debian.org/security/2023/dsa-5475
• https://comsec.ethz.ch/research/microarch/inception
• https://lists.fedoraproject.org/archives/list/[email protected]/message/HKKYIK2EASDNUV4I7EFJKNBVO3KCKGRR
• https://lists.fedoraproject.org/archives/list/[email protected]/message/L4E4TZNMLYL2KETY23IPA43QXFAVJ46V
• https://lists.fedoraproject.org/archives/list/[email protected]/message/PKK3IA63LSKM4EC3TN4UM6DDEIOWEQIG
• https://lists.fedoraproject.org/archives/list/[email protected]/message/T7WO5JM74YJSYAE5RBV4DC6A4YLEKWLF
• https://security.netapp.com/advisory/ntap-20240605-0006