PT-2023-14102 · Xen+1 · Xen+1
Jan Beulich
·
Publicado
2023-03-21
·
Atualizado
2024-06-15
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CVE-2022-42332
CVSS v3.1
7.8
Alta
| Vetor | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Xen (affected versions not specified)
Description
The issue arises in environments where host-assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, causing Xen to run guests in shadow mode. Shadow mode maintains a pool of memory for shadow page tables and auxiliary data structures. When migrating or snapshotting guests, Xen also runs them in log-dirty mode, which requires additional data structures. However, the demands of the log-dirty infrastructure were not considered, leading to a situation where newly established shadow page tables could be freed immediately, while other code is still accessing them. This results in a use-after-free scenario.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Use After Free
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Enumeração de Fraquezas
Identificadores relacionados
Produtos afetados
Suse
Xen