CVE-2023-46837
Fixed in a distro release EPSS <1%CVSS 3.3
Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance, used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all the writes will reach the memory. This undefined behavior was meant to be addressed by XSA-437, but the approach was not sufficient.
Products: xen
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.16 | xen | 4.16.5-r5 |
| Alpine 3.17 | xen | 4.16.5-r5 |
| Alpine 3.18 | xen | 4.17.2-r5 |
| Alpine 3.19 | xen | 4.18.0-r2 |
| Alpine 3.20 | xen | 4.18.0-r2 |
| Alpine 3.21 | xen | 4.18.0-r2 |
| Alpine 3.22 | xen | 4.18.0-r2 |
| Alpine 3.23 | xen | 4.18.0-r2 |
| Alpine 3.24 | xen | 4.18.0-r2 |
| Debian 12 | xen | 4.17.3+10-g091466ba55-1~deb12u1 |
| Debian 13 | xen | 4.17.3+10-g091466ba55-1 |
| Debian 14 | xen | 4.17.3+10-g091466ba55-1 |
| Ubuntu 16.04 LTS | xen | no fix |
| Ubuntu 18.04 LTS | xen | no fix |
| Ubuntu 20.04 LTS | xen | no fix |
| Ubuntu 22.04 LTS | xen | no fix |
| Ubuntu 24.04 LTS | xen | no fix |
| Ubuntu 25.10 | xen | no fix |
| Ubuntu 26.04 LTS | xen | no fix |
| Ubuntu 26.10 | xen | no fix |