x86: DMs may cause mem leak by IRQ binding
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.1%
exploitation probability
0.1%top 99% of all CVEs
observed exploitation
nono source reports it
When guests are terminated, various pieces of cleanup need carrying out.
The cleaning up of PCI devices which were assigned to guests, and the
associated removal of tracking structures for IRQs used by the devices
occurs relatively early in the process. Unfortunately after that point
the guest about to be terminated could cause its device model (DM) to
re-establish such tracking structures, by having it bind one or more IRQs
anew. While some of those tracking structures would still be cleaned up
later on, at least one would not be.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Affected products
Xen · Xen