Description
Use-after-free vulnerability in QEMU in Xen 4.5.x and earlier does not completely unplug emulated block devices, which allows local HVM guest users to gain privileges by unplugging a block device twice.
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 | qemu | 1:2.4+dfsg-1a | — |
| Debian 14 | xen | 4.4.0-1 | — |
| Debian 13 | qemu | 1:2.4+dfsg-1a | — |
| Debian 13 | xen | 4.4.0-1 | — |
| Debian 12 | qemu | 1:2.4+dfsg-1a | — |
| Debian 12 | xen | 4.4.0-1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | xen | 4.4.2_10-22.8.1 | SUSE-SU-2015:1384-1 |
| SLES 11 SP4 | xen | 4.4.2_12-23.1 | SUSE-SU-2015:1404-1 |
| SLES 11 SP3 | xen | 4.2.5_12-15.1 | SUSE-SU-2015:1479-2, SUSE-SU-2015:1479-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | xen | 4.4.2_10-22.8.1 | SUSE-SU-2015:1384-1 |
| SLES for SAP 11 SP4 | xen | 4.4.2_12-23.1 | SUSE-SU-2015:1404-1 |
| SLES for SAP 11 SP3 | xen | 4.2.5_12-15.1 | SUSE-SU-2015:1479-1 |
Advisories 4
- SUSE-SU-2015:1384-1 security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1404-1 security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1479-2 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1479-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
References
- FEDORA-2015-15944 vendor-advisory
- FEDORA-2015-14361 vendor-advisory
- FEDORA-2015-15946 vendor-advisory
- 76152 vdb-entry
- 1033175 vdb-entry
- http://xenbits.xen.org/xsa/advisory-139.html