There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - race in VT-d domain ID cleanup Xen domain IDs are up to 15 bits wide. VT-d hardware may allow for only
    less than 15 bits to hold a domain ID associating a physical device with a particular domain. Therefore
    internally Xen domain IDs are mapped to the smaller value range. The cleaning up of the housekeeping
    structures has a race, allowing for VT-d domain IDs to be leaked and flushes to be bypassed.
    (CVE-2022-26357)

  - guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of
    memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator
    established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It
    would then only be the overflowed (and hence small) number which gets compared against the established
    upper bound. (CVE-2021-28706)

  - arm: guest_physmap_remove_page not removing the p2m mappings The functions to remove one or more entries
    from a guest p2m pagetable on Arm (p2m_remove_mapping, guest_physmap_remove_page, and p2m_set_entry with
    mfn set to INVALID_MFN) do not actually clear the pagetable entry if the entry doesn't have the valid bit
    set. It is possible to have a valid pagetable entry without the valid bit set when a guest operating
    system uses set/way cache maintenance instructions. For instance, a guest issuing a set/way cache
    maintenance instruction, then calling the XENMEM_decrease_reservation hypercall to give back memory pages
    to Xen, might be able to retain access to those pages even after Xen started reusing them for other
    purposes. (CVE-2022-23033)

  - 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. (CVE-2022-23034)

  - Insufficient cleanup of passed-through device IRQs The management of IRQs associated with physical devices
    exposed to x86 HVM guests involves an iterative operation in particular when cleaning up after the guest's
    use of the device. In the case where an interrupt is not quiescent yet at the time this cleanup gets
    invoked, the cleanup attempt may be scheduled to be retried. When multiple interrupts are involved, this
    scheduling of a retry may get erroneously skipped. At the same time pointers may get cleared (resulting in
    a de-reference of NULL) and freed (resulting in a use-after-free), while other code would continue to
    assume them to be valid. (CVE-2022-23035)

ID	Name	Product	Family	Severity
407788	Alpine: xen: security update to 4.13.4-r3	Tenable Cloud Security	Alpine Linux Local Security Checks	high
407788	Alpine: xen: security update to 4.13.4-r3	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high

Detections

Analytics

CVE-2022-26401

No Score

Tenable Plugins

high

high