Description
With its original introduction, GNTTAB_cache_flush was made available
uniformly. XSA-232 (CVE-2017-14318) then covered an omitted NULL
pointer check, yet the addition of that check failed to adjust the
subsequent error path. That error path fails to drop a page reference in
case the specified page is owned by a special system domain (DOM_IO and
DOM_COW are system domains which can have memory pages assigned to them.)
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Xen | Xen | — | — |
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 | 4.20.4+39-gf1e1321c87-1 | — |
| Debian 13 | xen | 4.20.4+39-gf1e1321c87-0+deb13u1 | — |
| Debian 12 | xen | 4.17.7+13-g2445b30a44-0+deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | xen | No fix yet | — |
| Ubuntu 26.04 LTS | xen | No fix yet | — |
| Ubuntu 24.04 LTS | xen | No fix yet | — |
| Ubuntu 22.04 LTS | xen | No fix yet | — |
| Ubuntu 20.04 LTS | xen | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | xen | No fix yet | — |
| Ubuntu 16.04 LTS | xen | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | xen | 4.20.4_06-150700.3.49.2 | SUSE-SU-2026:4942-1 |
| SLES 15 SP6 | xen | 4.18.6_03-150600.3.56.1 | SUSE-SU-2026:5140-1 |
| SLES 15 SP5 | xen | 4.17.7_02-150500.3.82.1 | SUSE-SU-2026:4641-1 |
| SLES 15 SP4 | xen | 4.16.7_16-150400.4.95.1 | SUSE-SU-2026:4642-1 |
| SLES 12 SP5 | xen | 4.12.4_76-3.154.1 | SUSE-SU-2026:4732-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | xen | 4.18.6_03-150600.3.56.1 | SUSE-SU-2026:5140-1 |
| SLES for SAP 15 SP5 | xen | 4.17.7_02-150500.3.82.1 | SUSE-SU-2026:4641-1 |
| SLES for SAP 15 SP4 | xen | 4.16.7_16-150400.4.95.1 | SUSE-SU-2026:4642-1 |
| SLE Micro 5.5 | xen | 4.17.7_02-150500.3.82.1 | SUSE-SU-2026:4641-1 |
| SLE Micro 5.4 | xen | 4.16.7_16-150400.4.95.1 | SUSE-SU-2026:4642-1 |
| SLE Micro 5.3 | xen | 4.16.7_16-150400.4.95.1 | SUSE-SU-2026:4642-1 |
| SLE HPC 15 SP5 | xen | 4.17.7_02-150500.3.82.1 | SUSE-SU-2026:4641-1 |
| SLE HPC 15 SP4 | xen | 4.16.7_16-150400.4.95.1 | SUSE-SU-2026:4642-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | xen | 4.20.4-r2 | — |
| Alpine v3.22 | xen | 4.20.4-r2 | — |
| Alpine v3.21 | xen | 4.19.6-r2 | — |
Advisories 6
- SUSE-SU-2026:5140-1 Security update for xen SUSE / openSUSE Security Updates · Nov 10, 2026
- WID-SEC-2026-3930 Xen: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 9, 2026
- SUSE-SU-2026:4942-1 Security update for xen SUSE / openSUSE Security Updates · Oct 31, 2026
- SUSE-SU-2026:4732-1 Security update for xen SUSE / openSUSE Security Updates · Oct 20, 2026
- SUSE-SU-2026:4641-1 Security update for xen SUSE / openSUSE Security Updates · Oct 14, 2026
- SUSE-SU-2026:4642-1 Security update for xen SUSE / openSUSE Security Updates · Oct 14, 2026