Description
An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service because of an incompatibility between Process Context Identifiers (PCID) and shadow-pagetable switching.
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 | 4.11.1+92-g6c33308a8d-1 | — |
| Debian 13 | xen | 4.11.1+92-g6c33308a8d-1 | — |
| Debian 12 | xen | 4.11.1+92-g6c33308a8d-1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | xen | 4.10.4_04-3.22.1 | SUSE-RU-2019:2767-1 |
| SLES 12 SP4 | xen | 4.11.2_02-2.14.2 | SUSE-SU-2019:2753-1 |
| SLES 12 SP3 | xen | 4.9.4_04-3.56.2 | SUSE-SU-2019:2769-1 |
| SLES 12 SP2 | xen | 4.7.6_06-43.54.2 | SUSE-SU-2019:2783-1 |
| SLES 11 SP4 | xen | 4.4.4_40-61.49.1 | SUSE-SU-2019:14199-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP4 | xen | 4.11.2_02-2.14.2 | SUSE-SU-2019:2753-1 |
| SLES for SAP 12 SP3 | xen | 4.9.4_04-3.56.2 | SUSE-SU-2019:2769-1 |
| SLES for SAP 12 SP2 | xen | 4.7.6_06-43.54.2 | SUSE-SU-2019:2783-1 |
| SUSE OpenStack Cloud Crowbar 8 | xen | 4.9.4_04-3.56.2 | SUSE-SU-2019:2769-1 |
| SUSE OpenStack Cloud 8 | xen | 4.9.4_04-3.56.2 | SUSE-SU-2019:2769-1 |
| SUSE OpenStack Cloud 7 | xen | 4.7.6_06-43.54.2 | SUSE-SU-2019:2783-1 |
| SUSE HPE Helion OpenStack 8 | xen | 4.9.4_04-3.56.2 | SUSE-SU-2019:2769-1 |
| SUSE Enterprise Storage 5 | xen | 4.9.4_04-3.56.2 | SUSE-SU-2019:2769-1 |
| SUSE Enterprise Storage 4 | xen | 4.7.6_06-43.54.2 | SUSE-SU-2019:2783-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.9 | xen | 4.11.2-r0 | — |
Advisories 5
- SUSE-SU-2019:14199-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2753-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-RU-2019:2767-1 Recommended update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2783-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2769-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://xenbits.xen.org/xsa/advisory-294.html
- https://xenbits.xen.org/xsa/advisory-294.html
- [oss-security] 20191025 Xen Security Advisory 294 v3 (CVE-2019-17348) - x86 shadow: Insufficient TLB flushing when using PCID mailing-list
- DSA-4602 vendor-advisory
- 20200114 [SECURITY] [DSA 4602-1] xen security update mailing-list