Description
A grant unmapping issue was discovered in Xen through 4.9.x. When removing or replacing a grant mapping, the x86 PV specific path needs to make sure page table entries remain in sync with other accounting done. Although the identity of the page frame was validated correctly, neither the presence of the mapping nor page writability were taken into account.
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
- 1039351 vdb-entry
- https://support.citrix.com/article/CTX227185
- DSA-4050 vendor-advisory
- 100819 vdb-entry
- [debian-lts-announce] 20181018 [SECURITY] [DLA 1549-1] xen security update mailing-list
- http://xenbits.xen.org/xsa/advisory-234.html