Description
GNTTABOP_swap_grant_ref in Xen 4.2 through 4.5 does not check the grant table operation version, which allows local guest domains to cause a denial of service (NULL pointer dereference) via a hypercall without a GNTTABOP_setup_table or GNTTABOP_set_version.
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+deb8u1 | DSA-3286-1 |
| Debian 7 | xen | 4.1.4-3+deb7u8 | DSA-3286-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | xen | 4.4.2-0ubuntu0.14.04.2 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | xen | 4.4.2_06-21.1 | SUSE-SU-2015:1042-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | xen | 4.4.2_06-21.1 | SUSE-SU-2015:1042-1 |
Advisories 2
- DSA-3286-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:1042-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://support.citrix.com/article/CTX206006
- DSA-3286 vendor-advisory
- 75141 vdb-entry
- SUSE-SU-2015:1157 vendor-advisory
- http://support.citrix.com/article/CTX201145
- SUSE-SU-2015:1045 vendor-advisory
- http://xenbits.xen.org/xsa/advisory-134.html
- GLSA-201604-03 vendor-advisory
- 1032568 vdb-entry
- SUSE-SU-2015:1042 vendor-advisory