Improper Resource Shutdown or Release Affecting xen-libs package, versions <4.12.4_18-3.60.2


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-SLES151-XENLIBS-2643325
  • published14 Apr 2022
  • disclosed17 Feb 2022

Introduced: 17 Feb 2022

CVE-2022-23033  (opens in a new tab)
CWE-404  (opens in a new tab)

How to fix?

Upgrade SLES:15.1 xen-libs to version 4.12.4_18-3.60.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen-libs package and not the xen-libs package as distributed by SLES. See How to fix? for SLES:15.1 relevant fixed versions and status.

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.

CVSS Scores

version 3.1