Most recent entries from all

certfr-2023-avi-0834 — De multiples vulnérabilités ont été découvertes dans Xen. Elles permettent à un attaquant d…

certfr-2023-avi-0834

EUVD-2026-259673

fkie_cve-2023-34328

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

AMD CPUs since ~2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions.

Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service.

1) CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previous vCPUs debug mask state.

2) CVE-2023-34328 - A PV vCPU can place a breakpoint over the live GDT. This allows the PV vCPU to exploit XSA-156 / CVE-2015-8104 and lock up the CPU entirely.

GHSA-fm4g-p248-j5wj

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

AMD CPUs since ~2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions.

Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service.

1) CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previous vCPUs debug mask state.

2) CVE-2023-34328 - A PV vCPU can place a breakpoint over the live GDT. This allows the PV vCPU to exploit XSA-156 / CVE-2015-8104 and lock up the CPU entirely.

gsd-2023-34328

SUSE-SU-2023:4054-1 — Security update for xen

Security update for xen

UBUNTU-CVE-2023-34328

Affected: Ubuntu:16.04:LTS: xen, Ubuntu:18.04:LTS: xen, Ubuntu:20.04:LTS: xen, Ubuntu:22.04:LTS: xen, Ubuntu:24.04:LTS: xen, Ubuntu:25.10: xen, Ubuntu:26.04:LTS: xen

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] AMD CPUs since ~2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service. 1) CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previous vCPUs debug mask state. 2) CVE-2023-34328 - A PV vCPU can place a breakpoint over the live GDT. This allows the PV vCPU to exploit XSA-156 / CVE-2015-8104 and lock up the CPU entirely.

WID-SEC-W-2023-2617 — Xen: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Xen ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen, beliebigen Code auszuführen, vertrauliche Informationen offenzulegen oder seine Privilegien zu erweitern.