Cross-thread return address predictions in AMD processors

1) Cross-thread return address predictions

EUVDB-ID: #VU72470

Risk: Low

CVSSv3.1: 2.2 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-27672

CWE-ID: CWE-1342 - Information Exposure through Microarchitectural State after Transient Execution

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to certain AMD processors may speculatively execute instructions at an incorrect return site after an SMT mode switch that may potentially lead to information disclosure.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

AMD Athlon X4 processor: All versions

AMD Ryzen Threadripper PRO processor: All versions

2nd Gen AMD Ryzen Threadripper processors: All versions

3rd Gen AMD Ryzen Threadripper processors: All versions

7th Generation AMD A-Series APUs: All versions

AMD Ryzen 2000 series Desktop processor: All versions

AMD Ryzen 3000 Series Desktop processor: All versions

AMD Ryzen 4000 Series Desktop processors with Radeon graphics: All versions

AMD Ryzen 2000 Series Mobile processor: All versions

AMD Athlon 3000 Series Mobile processor with Radeon graphics: All versions

2nd Gen AMD Ryzen Mobile processor with Radeon graphics: All versions

AMD Ryzen 4000 Series Mobile processors with Radeon graphics: All versions

AMD Ryzen 5000 Series Mobile processor with Radeon graphics: All versions

AMD Athlon Mobile processor with Radeon graphics: All versions

1st Gen AMD EPYC Processors: All versions

2nd Gen AMD EPYC Processors: All versions

External links

http://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1045

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.