Unrated severityNVD Advisory· Published Jan 5, 2024· Updated Nov 4, 2025
x86/AMD: Debug Mask handling
CVE-2023-34327
Description
[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.
Affected products
31- osv-coords30 versionspkg:rpm/opensuse/xen&distro=openSUSE%20Leap%2015.4pkg:rpm/opensuse/xen&distro=openSUSE%20Leap%2015.5pkg:rpm/opensuse/xen&distro=openSUSE%20Leap%20Micro%205.3pkg:rpm/opensuse/xen&distro=openSUSE%20Leap%20Micro%205.4pkg:rpm/opensuse/xen&distro=openSUSE%20Tumbleweedpkg:rpm/suse/xen&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-ESPOSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Micro%205.3pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Micro%205.4pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP4pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP4pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP5pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/xen&distro=SUSE%20Manager%20Proxy%204.2pkg:rpm/suse/xen&distro=SUSE%20Manager%20Server%204.2
< 4.16.5_06-150400.4.37.1+ 29 more
- (no CPE)range: < 4.16.5_06-150400.4.37.1
- (no CPE)range: < 4.17.2_06-150500.3.12.1
- (no CPE)range: < 4.16.5_08-150400.4.40.1
- (no CPE)range: < 4.16.5_08-150400.4.40.1
- (no CPE)range: < 4.18.0_02-1.1
- (no CPE)range: < 4.14.6_06-150300.3.57.1
- (no CPE)range: < 4.12.4_40-150100.3.95.1
- (no CPE)range: < 4.13.5_06-150200.3.80.1
- (no CPE)range: < 4.14.6_06-150300.3.57.1
- (no CPE)range: < 4.14.6_06-150300.3.57.1
- (no CPE)range: < 4.14.6_06-150300.3.57.1
- (no CPE)range: < 4.14.6_06-150300.3.57.1
- (no CPE)range: < 4.16.5_06-150400.4.37.1
- (no CPE)range: < 4.16.5_06-150400.4.37.1
- (no CPE)range: < 4.17.2_06-150500.3.12.1
- (no CPE)range: < 4.16.5_06-150400.4.37.1
- (no CPE)range: < 4.17.2_06-150500.3.12.1
- (no CPE)range: < 4.16.5_06-150400.4.37.1
- (no CPE)range: < 4.17.2_06-150500.3.12.1
- (no CPE)range: < 4.12.4_40-3.97.1
- (no CPE)range: < 4.12.4_40-150100.3.95.1
- (no CPE)range: < 4.13.5_06-150200.3.80.1
- (no CPE)range: < 4.14.6_06-150300.3.57.1
- (no CPE)range: < 4.12.4_40-3.97.1
- (no CPE)range: < 4.12.4_40-150100.3.95.1
- (no CPE)range: < 4.13.5_06-150200.3.80.1
- (no CPE)range: < 4.14.6_06-150300.3.57.1
- (no CPE)range: < 4.12.4_40-3.97.1
- (no CPE)range: < 4.14.6_06-150300.3.57.1
- (no CPE)range: < 4.14.6_06-150300.3.57.1
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1News mentions
0No linked articles in our index yet.