Release Date: | 2022-04-05 | |
Impact: | None | What is this? |
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.
See more information about CVE-2022-26356 from MITRE CVE dictionary and NIST NVD
NOTE: The following CVSS metrics and score provided are preliminary and subject to review.
Base Score: | 5.6 |
Vector String: | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H |
Version: | 3.0 |
Attack Vector: | Local |
Attack Complexity: | High |
Privileges Required: | Low |
User Interaction: | None |
Scope: | Changed |
Confidentiality Impact: | None |
Integrity Impact: | None |
Availability Impact: | High |
Platform | Errata | Release Date |
Oracle VM version 3 (xen) | OVMSA-2022-0012 | 2022-04-08 |
This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections: