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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Xen | Xen | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | xen | 4.17.2+55-g0b56bed864-1 | — |
| Debian 13 | xen | 4.17.2+55-g0b56bed864-1 | — |
| Debian 12 | xen | 4.17.2+76-ge1f9cb16e2-1~deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | xen | No fix yet | — |
| Ubuntu 26.04 LTS | xen | No fix yet | — |
| Ubuntu 25.10 | xen | No fix yet | — |
| Ubuntu 24.04 LTS | xen | No fix yet | — |
| Ubuntu 22.04 LTS | xen | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | xen | No fix yet | — |
| Ubuntu 18.04 LTS | xen | No fix yet | — |
| Ubuntu 16.04 LTS | xen | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | xen | 4.17.2_06-150500.3.12.1 | SUSE-SU-2023:4475-1, SUSE-SU-2023:4054-1 |
| SLES 15 SP4 | xen | 4.16.5_06-150400.4.37.1 | SUSE-SU-2023:4476-1, SUSE-SU-2023:4055-1 |
| SLES 15 SP3 | xen | 4.14.6_06-150300.3.57.1 | SUSE-SU-2023:4174-1 |
| SLES 15 SP2 | xen | 4.13.5_06-150200.3.80.1 | SUSE-SU-2023:4183-1 |
| SLES 15 SP1 | xen | 4.12.4_40-150100.3.95.1 | SUSE-SU-2023:4184-1 |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | xen | 4.12.4_40-3.97.1 | SUSE-SU-2023:4185-1 |
| SLES for SAP 15 SP3 | xen | 4.14.6_06-150300.3.57.1 | SUSE-SU-2023:4174-1 |
| SLES for SAP 15 SP2 | xen | 4.13.5_06-150200.3.80.1 | SUSE-SU-2023:4183-1 |
| SLES for SAP 15 SP1 | xen | 4.12.4_40-150100.3.95.1 | SUSE-SU-2023:4184-1 |
| SLES for SAP 12 SP5 | xen | 4.12.4_40-3.97.1 | SUSE-SU-2023:4185-1 |
| SLE Micro 5.5 | xen | 4.17.2_06-150500.3.12.1 | SUSE-SU-2023:4475-1, SUSE-SU-2023:4054-1 |
| SLE Micro 5.4 | xen | 4.16.5_06-150400.4.37.1 | SUSE-SU-2023:4476-1, SUSE-SU-2023:4055-1 |
| SLE Micro 5.3 | xen | 4.16.5_06-150400.4.37.1 | SUSE-SU-2023:4476-1, SUSE-SU-2023:4055-1 |
| SLE Micro 5.2 | xen | 4.14.6_06-150300.3.57.1 | SUSE-SU-2023:4174-1 |
| SLE Micro 5.1 | xen | 4.14.6_06-150300.3.57.1 | SUSE-SU-2023:4174-1 |
| SLE HPC 15 SP3 | xen | 4.14.6_06-150300.3.57.1 | SUSE-SU-2023:4174-1 |
| SLE HPC 15 SP2 | xen | 4.13.5_06-150200.3.80.1 | SUSE-SU-2023:4183-1 |
| SLE HPC 15 SP1 | xen | 4.12.4_40-150100.3.95.1 | SUSE-SU-2023:4184-1 |
| SUSE Manager Server 4.2 | xen | 4.14.6_06-150300.3.57.1 | SUSE-SU-2023:4174-1 |
| SUSE Manager Proxy 4.2 | xen | 4.14.6_06-150300.3.57.1 | SUSE-SU-2023:4174-1 |
| SUSE Enterprise Storage 7.1 | xen | 4.14.6_06-150300.3.57.1 | SUSE-SU-2023:4174-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | xen | 4.17.2_06-150500.3.12.1 | SUSE-SU-2023:4475-1, SUSE-SU-2023:4054-1 |
| openSUSE Leap 15.4 | xen | 4.16.5_06-150400.4.37.1 | SUSE-SU-2023:4476-1, SUSE-SU-2023:4055-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.4 | xen | 4.16.5_08-150400.4.40.1 | SUSE-SU-2023:4476-1 |
| openSUSE Leap Micro 5.3 | xen | 4.16.5_08-150400.4.40.1 | SUSE-SU-2023:4476-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.17.2-r3 | — |
| Alpine v3.23 | xen | 4.17.2-r3 | — |
| Alpine v3.22 | xen | 4.17.2-r3 | — |
| Alpine v3.21 | xen | 4.17.2-r3 | — |
| Alpine v3.20 | xen | 4.17.2-r3 | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.17.2-r3 | — |
| Alpine v3.18 | xen | 4.17.2-r3 | — |
| Alpine v3.17 | xen | 4.16.5-r3 | — |
| Alpine v3.16 | xen | 4.16.5-r3 | — |
| Alpine v3.15 | xen | 4.15.5-r3 | — |
Advisories 9
- SUSE-SU-2023:4054-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4183-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4184-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4174-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4185-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4476-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4475-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-2617 Xen: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 27, 2025
- SUSE-SU-2023:4055-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025