🛡️ CVE-2022-23034
🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-191 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. When both are in use for any individual mapping, unmapping of such a mapping can be requested in two steps. The reference count for such a mapping would then mistakenly be decremented twice. Underflow of the counters gets detected, resulting in the triggering of a hypervisor bug check.

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE CWE-191
Public Exploit ✅ No
Source NVD
Published 2022-01-25
Updated 2026-06-08
Modified 2024-11-21

Affected Packages

Software From version Fixed in
debian-linux — —
fedora — —
xen 3.2.0 4.13.0

References

Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2022/01/25/3
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2022/01/25/3

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