CVE-2022-42334
Reported by xen · Published March 21, 2023
x86/HVM pinned cache attributes mis-handling T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] To allow cachability control for HVM guests with passed through devices, an interface exists to explicitly override defaults which would otherwise be put in place. While not exposed to the affected guests themselves, the interface specifically exists for domains controlling such guests. This interface may therefore be used by not fully privileged entities, e.g. qemu running deprivileged in Dom0 or qemu running in a so called stub-domain. With this exposure it is an issue that - the number of the such controlled regions was unbounded (CVE-2022-42333), - installation and removal of such regions was not properly serialized (CVE-2022-42334).
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Xen | xen | consult Xen advisory XSA-428 |
| Xen | xen | * |
Timeline
- Mar 20, 2023 CVE Published
- Mar 22, 2023 EPSS Score (30 in total, the first dated here)
- Mar 10, 2026 Distribution Patch
- Mar 10, 2026 Security Advisory (3 in total, the first dated here)
- Jun 15, 2026 Coalition ESS Score
- Jun 17, 2026 CVE Updated
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References
- [oss-security] 20230321 Xen Security Advisory 428 v3 (CVE-2022-42333,CVE-2022-42334) - x86/HVM pinned cache attributes mis-handling mailing-list
- FEDORA-2023-703f133eb3 vendor-advisory
- FEDORA-2023-da8315e641 vendor-advisory
- DSA-5378 vendor-advisory