{"id":"CVE-2022-23034","details":"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.","modified":"2026-03-15T22:43:45.882032Z","published":"2022-01-25T14:15:09.010Z","related":["SUSE-SU-2022:0331-1","SUSE-SU-2022:0332-1","SUSE-SU-2022:0333-1","SUSE-SU-2022:0342-1","SUSE-SU-2022:0359-1","SUSE-SU-2022:0467-1","SUSE-SU-2022:0468-1","SUSE-SU-2022:0469-1","SUSE-SU-2022:14886-1","openSUSE-SU-2022:0333-1","openSUSE-SU-2024:11781-1"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2022/01/25/3"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202208-23"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5117"},{"type":"FIX","url":"https://xenbits.xenproject.org/xsa/advisory-394.txt"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"3.2.0"},{"fixed":"4.13.0"}]},{"events":[{"introduced":"0"},{"last_affected":"34"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"11.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-23034.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}