Description
The (1) libxl_set_memory_target function in tools/libxl/libxl.c and (2) libxl__build_post function in tools/libxl/libxl_dom.c in Xen 3.4.x through 4.6.x do not properly calculate the balloon size when using the populate-on-demand (PoD) system, which allows local HVM guest users to cause a denial of service (guest crash) via unspecified vectors related to "heavy memory pressure."
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 | 4.6.0-1 | — |
| Debian 13 | xen | 4.6.0-1 | — |
| Debian 12 | xen | 4.6.0-1 | — |
| Debian 8 | xen | 4.4.1-9+deb8u3 | DSA-3414-1 |
| Debian 7 | xen | 4.1.6.1-1+deb7u1 | DLA-479-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | xen | 4.4.2-0ubuntu0.14.04.3 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | xen | 4.4.3_06-22.15.1 | SUSE-SU-2015:2328-1 |
| SLES 11 SP4 | xen | 4.4.3_06-29.1 | SUSE-SU-2015:2338-1 |
| SLES 11 SP3 | xen | 4.2.5_18-21.1 | SUSE-SU-2015:2326-1 |
| SLES 11 SP2 | xen | 4.1.6_08-23.1 | SUSE-SU-2015:2306-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | xen | 4.4.3_06-22.15.1 | SUSE-SU-2015:2328-1 |
| SLES for SAP 11 SP4 | xen | 4.4.3_06-29.1 | SUSE-SU-2015:2338-1 |
| SLES for SAP 11 SP3 | xen | 4.2.5_18-21.1 | SUSE-SU-2015:2326-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.7.0_12-1.3 | openSUSE-SU-2024:10196-1 |
Advisories 7
- DLA-479-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3414-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:2328-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2326-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2306-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2338-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10196-1 xen-4.7.0_12-1.3 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- http://support.citrix.com/article/CTX202404
- FEDORA-2015-242be2c240 vendor-advisory
- FEDORA-2015-a931b02be2 vendor-advisory
- http://xenbits.xen.org/xsa/advisory-153.html
- 77365 vdb-entry
- openSUSE-SU-2015:1965 vendor-advisory
- DSA-3414 vendor-advisory
- FEDORA-2015-6f6b79efe2 vendor-advisory
- GLSA-201604-03 vendor-advisory
- 1034036 vdb-entry