CVEvulnerability
CVE-2022-23034
5.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2022-01-25
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 2.1 LOW — AV:L/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-191
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.
Affected configurations
• xen xen (>= 3.2.0 < 4.13.0)
• fedoraproject fedora 34
• debian debian linux 9.0
• debian debian linux 11.0
Related
Weakness · CWE (1)
- CWE-191 Integer Underflow (Wrap or Wraparound) weakness
References
- http://www.openwall.com/lists/oss-security/2022/01/25/3 Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/ lists.fedoraproject.org
- https://security.gentoo.org/glsa/202208-23 Third Party Advisory
- https://www.debian.org/security/2022/dsa-5117 Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-394.txt Patch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2022/01/25/3 Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/ lists.fedoraproject.org
- https://security.gentoo.org/glsa/202208-23 Third Party Advisory
- https://www.debian.org/security/2022/dsa-5117 Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-394.txt Patch, Vendor Advisory