[Pkg-xen-devel] Bug#1031567: xen: CVE-2022-27672: XSA-426: x86: Cross-Thread Return Address Predictions

[Salvatore Bonaccorso]

Source: xen
Version: 4.17.0+24-g2f8851c37f-2
Severity: grave
Tags: security upstream
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for xen, filling with RC
severity (for ideally fixed before bookworm release):

CVE-2022-27672[0]:
| When SMT is enabled, certain AMD processors may speculatively execute
| instructions using a target from the sibling thread after an SMT mode
| switch potentially resulting in information disclosure.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2022-27672
    https://www.cve.org/CVERecord?id=CVE-2022-27672
[1] https://xenbits.xen.org/xsa/advisory-426.html

Regards,
Salvatore