Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.
CVSS Details
- CVSS 3.1 Base Score: 5.6
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade xen | Mar 26, 2024 | Apr 5, 2022 |
| Debian | — | Upgrade xen | Nov 4, 2022 | Apr 5, 2022 |
| Gentoo Linux | — | Upgrade app-emulation/xen. | Feb 5, 2024 | Apr 5, 2022 |
| Suse | — | Upgrade xenUpgrade xen-tools-xendomains-wait-diskUpgrade xen-develUpgrade xen-tools-domUUpgrade xen-doc-htmlUpgrade xen-libs-32bitUpgrade xen-toolsUpgrade xen-libs | Oct 26, 2022 | Apr 5, 2022 |
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