Description
When grant-copy operations are processed, the respective grant may or may
not already be in use by another operation (a mapping or another copy).
For all copy operations the referenced guest frame is looked up. When
another operation is already active for the grant (the grant is "pinned"),
what is being supplied back to actually carry out permission checks and
copy operation may not be consistent: The permission check may be carried
out on a page different from the one involved in the copy.
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 | 4.20.3+127-gc42374a105-1 | — |
| Debian 13 | xen | 4.20.3+127-gc42374a105-0+deb13u1 | — |
| Debian 12 | xen | 4.17.7-0+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_04-150700.3.46.1 | SUSE-SU-2026:4090-1 |
| SLES 15 SP6 | xen | 4.18.5_20-150600.3.53.3 | SUSE-SU-2026:3409-1 |
| SLES 15 SP5 | xen | 4.17.6_14-150500.3.76.3 | SUSE-SU-2026:3423-1 |
| SLES 15 SP4 | xen | 4.16.7_12-150400.4.89.3 | SUSE-SU-2026:3462-1 |
| SLES 12 SP5 | xen | 4.12.4_72-3.148.4 | SUSE-SU-2026:3451-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | xen | 4.18.5_20-150600.3.53.3 | SUSE-SU-2026:3409-1 |
| SLES for SAP 15 SP5 | xen | 4.17.6_14-150500.3.76.3 | SUSE-SU-2026:3423-1 |
| SLES for SAP 15 SP4 | xen | 4.16.7_12-150400.4.89.3 | SUSE-SU-2026:3462-1 |
| SLE Micro 5.5 | xen | 4.17.6_14-150500.3.76.3 | SUSE-SU-2026:3423-1 |
| SLE Micro 5.4 | xen | 4.16.7_12-150400.4.89.3 | SUSE-SU-2026:3462-1 |
| SLE Micro 5.3 | xen | 4.16.7_12-150400.4.89.3 | SUSE-SU-2026:3462-1 |
| SLE HPC 15 SP5 | xen | 4.17.6_14-150500.3.76.3 | SUSE-SU-2026:3423-1 |
| SLE HPC 15 SP4 | xen | 4.16.7_12-150400.4.89.3 | SUSE-SU-2026:3462-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.22.0_02-1.1 | openSUSE-SU-2026:11441-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.21.2-r0 | — |
| Alpine v3.23 | xen | 4.20.4-r0 | — |
| Alpine v3.22 | xen | 4.20.4-r0 | — |
| Alpine v3.21 | xen | 4.19.6-r0 | — |
Advisories 7
- WID-SEC-2026-2568 Xen: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 4, 2026
- SUSE-SU-2026:4090-1 Security update for xen SUSE / openSUSE Security Updates · Sep 13, 2026
- SUSE-SU-2026:3462-1 Security update for xen SUSE / openSUSE Security Updates · Aug 4, 2026
- SUSE-SU-2026:3451-1 Security update for xen SUSE / openSUSE Security Updates · Aug 4, 2026
- openSUSE-SU-2026:11441-1 xen-4.22.0_02-1.1 on GA media SUSE / openSUSE Security Updates · Aug 4, 2026
- SUSE-SU-2026:3409-1 Security update for xen SUSE / openSUSE Security Updates · Jul 30, 2026
- SUSE-SU-2026:3423-1 Security update for xen SUSE / openSUSE Security Updates · Jul 30, 2026