🛡️ CVE-2022-26356
🟡 CVSS 5.6 — Medium ✅ No Known Exploit CWE-667 NVD
5.6
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 5.6
CVSS Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE CWE-667
Public Exploit ✅ No
Source NVD
Published 2022-04-05
Updated 2026-06-08
Modified 2024-11-21

Affected Packages

Software From version Fixed in
debian-linux — —
fedora — —
xen 4.15.0 4.16.0

References

Mailing List, Patch, Third Party Advisory http://www.openwall.com/lists/oss-security/2022/04/05/1
Patch, Third Party Advisory http://xenbits.xen.org/xsa/advisory-397.html
Mailing List, Patch, Third Party Advisory http://www.openwall.com/lists/oss-security/2022/04/05/1
Patch, Third Party Advisory http://xenbits.xen.org/xsa/advisory-397.html

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