xen: CVE-2022-27672: XSA-426: x86: Cross-Thread Return Address Predictions

Related Vulnerabilities: CVE-2022-27672  

Debian Bug report logs - #1031567
xen: CVE-2022-27672: XSA-426: x86: Cross-Thread Return Address Predictions

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Reported by: Salvatore Bonaccorso <carnil@debian.org>

Date: Sat, 18 Feb 2023 19:33:01 UTC

Severity: grave

Tags: security, upstream

Found in version xen/4.17.0+24-g2f8851c37f-2

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Report forwarded to debian-bugs-dist@lists.debian.org, carnil@debian.org, team@security.debian.org, Debian Xen Team <pkg-xen-devel@lists.alioth.debian.org>:
Bug#1031567; Package src:xen. (Sat, 18 Feb 2023 19:33:03 GMT) (full text, mbox, link).


Acknowledgement sent to Salvatore Bonaccorso <carnil@debian.org>:
New Bug report received and forwarded. Copy sent to carnil@debian.org, team@security.debian.org, Debian Xen Team <pkg-xen-devel@lists.alioth.debian.org>. (Sat, 18 Feb 2023 19:33:03 GMT) (full text, mbox, link).


Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: xen: CVE-2022-27672: XSA-426: x86: Cross-Thread Return Address Predictions
Date: Sat, 18 Feb 2023 20:30:31 +0100
Source: xen
Version: 4.17.0+24-g2f8851c37f-2
Severity: grave
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@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



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