Description
A domain cleanup issue was discovered in the C xenstore daemon (aka cxenstored) in Xen through 4.9.x. When shutting down a VM with a stubdomain, a race in cxenstored may cause a double-free. The xenstored daemon may crash, resulting in a DoS of any parts of the system relying on it (including domain creation / destruction, ballooning, device changes, etc.).
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 | 4.8.2+xsa245-0+deb9u1 | — |
| Debian 13 | xen | 4.8.2+xsa245-0+deb9u1 | — |
| Debian 12 | xen | 4.8.2+xsa245-0+deb9u1 | — |
| Debian 9 | xen | 4.8.2+xsa245-0+deb9u1 | DSA-4050-1 |
| Debian 8 | xen | 4.4.4lts2-0+deb8u1 | DLA-1549-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | xen | 4.1.6.lts1-9 | DLA-1132-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | xen | 4.6.5-0ubuntu1.4 | — |
| Ubuntu 14.04 LTS | xen | 4.4.2-0ubuntu0.14.04.14 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | xen | 4.9.0_12-3.15.1 | SUSE-SU-2017:2420-1 |
| SLES 12 SP2 | xen | 4.7.3_04-43.12.1 | SUSE-SU-2017:2519-1 |
| SLES 12 SP1 | xen | 4.5.5_16-22.28.1 | SUSE-SU-2017:2466-1 |
| SLES 12 | xen | 4.4.4_22-22.51.2 | SUSE-SU-2017:2541-1 |
| SLES 11 SP4 | xen | 4.4.4_22-61.9.2 | SUSE-SU-2017:2450-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP3 | xen | 4.2.5_21-45.8.1 | SUSE-SU-2017:2611-1 |
| SLES for SAP 12 SP3 | xen | 4.9.0_12-3.15.1 | SUSE-SU-2017:2420-1 |
| SLES for SAP 12 SP2 | xen | 4.7.3_04-43.12.1 | SUSE-SU-2017:2519-1 |
| SLES for SAP 12 SP1 | xen | 4.5.5_16-22.28.1 | SUSE-SU-2017:2466-1 |
| SLES for SAP 12 | xen | 4.4.4_22-22.51.2 | SUSE-SU-2017:2541-1 |
| SLES for SAP 11 SP4 | xen | 4.4.4_22-61.9.2 | SUSE-SU-2017:2450-1 |
| SUSE OpenStack Cloud 6 | xen | 4.5.5_16-22.28.1 | SUSE-SU-2017:2466-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | xen | 4.2.5_21-45.8.1 | SUSE-SU-2017:2611-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.9.0-r4 | — |
| Alpine v3.23 | xen | 4.9.0-r4 | — |
| Alpine v3.22 | xen | 4.9.0-r4 | — |
| Alpine v3.21 | xen | 4.9.0-r4 | — |
| Alpine v3.20 | xen | 4.9.0-r4 | — |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.9.0-r4 | — |
| Alpine v3.18 | xen | 4.9.0-r4 | — |
| Alpine v3.17 | xen | 4.9.0-r4 | — |
| Alpine v3.16 | xen | 4.9.0-r4 | — |
| Alpine v3.15 | xen | 4.9.0-r4 | — |
| Alpine v3.14 | xen | 4.9.0-r4 | — |
| Alpine v3.13 | xen | 4.9.0-r4 | — |
| Alpine v3.12 | xen | 4.9.0-r4 | — |
| Alpine v3.11 | xen | 4.9.0-r4 | — |
| Alpine v3.10 | xen | 4.9.0-r4 | — |
| Alpine v3.9 | xen | 4.9.0-r4 | — |
| Alpine v3.8 | xen | 4.9.0-r4 | — |
| Alpine v3.7 | xen | 4.9.0-r4 | — |
| Alpine v3.6 | xen | 4.8.2-r1 | — |
| Alpine v3.5 | xen | 4.7.2-r2 | — |
| Alpine v3.4 | xen | 4.6.3-r11 | — |
| Alpine v3.3 | xen | 4.6.3-r9 | — |
Advisories 9
- DLA-1549-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4050-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1132-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:2420-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2450-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2466-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2519-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2611-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2541-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 1039350 vdb-entry
- http://xenbits.xen.org/xsa/advisory-233.html
- DSA-4050 vendor-advisory
- [debian-lts-announce] 20181018 [SECURITY] [DLA 1549-1] xen security update mailing-list
- 100826 vdb-entry