CVE-2022-26356
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
05/04/2022
Last modified:
04/02/2024
Description
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.
Impact
Base Score 3.x
5.60
Severity 3.x
MEDIUM
Base Score 2.0
4.00
Severity 2.0
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* | 4.0.0 (including) | 4.12.0 (excluding) |
| cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* | 4.13.0 (including) | 4.14.0 (excluding) |
| cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* | 4.15.0 (including) | 4.16.0 (excluding) |
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | ||
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | ||
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- http://www.openwall.com/lists/oss-security/2022/04/05/1
- http://xenbits.xen.org/xsa/advisory-397.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/
- https://security.gentoo.org/glsa/202402-07
- https://www.debian.org/security/2022/dsa-5117
- https://xenbits.xenproject.org/xsa/advisory-397.txt