CVE-2022-23034 — Integer Underflow (Wrap or Wraparound) in XEN
Severity
5.5MEDIUMNVD
EPSS
0.1%
top 71.46%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJan 25
Latest updateJan 26
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 hypervis…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6
Affected Packages3 packages
Also affects: Debian Linux 11.0, 9.0, Fedora 34
Patches
🔴Vulnerability Details
2GHSA▶
GHSA-5jmq-x85f-gprc: 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 gues↗2022-01-26
OSV▶
CVE-2022-23034: 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 gues↗2022-01-25