| Name | CVE-2022-42335 |
| Description | x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1034842 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| xen (PTS) | jessie, jessie (lts) | 4.4.4lts5-0+deb8u1 | vulnerable |
| stretch (security), stretch (lts), stretch | 4.8.5.final+shim4.10.4-1+deb9u12 | vulnerable |
| buster (security), buster, buster (lts) | 4.11.4+107-gef32c7afa2-1 | fixed |
| bullseye | 4.14.6-1 | fixed |
| bullseye (security) | 4.14.5+94-ge49571868d-1 | fixed |
| bookworm | 4.17.3+10-g091466ba55-1~deb12u1 | fixed |
| sid, trixie | 4.17.3+36-g54dacb5c02-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| xen | source | jessie | (unfixed) | end-of-life | | |
| xen | source | stretch | (unfixed) | end-of-life | | |
| xen | source | buster | (not affected) | | | |
| xen | source | bullseye | (not affected) | | | |
| xen | source | (unstable) | 4.17.1+2-gb773c48e36-1 | | | 1034842 |
Notes
[bullseye] - xen <not-affected> (Vulnerable code not present)
[buster] - xen <not-affected> (Vulnerable code not present)
https://www.openwall.com/lists/oss-security/2023/04/25/1
https://xenbits.xen.org/xsa/advisory-430.html