Skip to content
Fencer Vulns
high 7.8

CVE-2022-23033 json

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…

published 2022-01-25 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-28144

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

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.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.16.0+51-g0941d6cb-1

debian advisories DEBIAN-CVE-2022-23033

  • xen SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 4.12.4_18-3.58.2
  • xen SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +3 more 4.12.4_18-3.60.2
  • xen SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +8 more 4.13.4_04-3.43.2
  • xen SLE Module for Server Applications 15 SP3, SLE Module for Basesystem 15 SP3, SLE Micro 5.1 4.14.3_06-150300.3.18.2

suse advisories SUSE-SU-2022:0469-1SUSE-SU-2022:0468-1SUSE-SU-2022:0467-1SUSE-SU-2022:0333-1

  • xen openSUSE Tumbleweed 4.16.0_04-3.1
  • xen openSUSE Leap 15.3 4.14.3_06-150300.3.18.2

opensuse advisories openSUSE-SU-2024:11781-1openSUSE-SU-2022:0333-1

  • xen Alpine 3.12 4.13.4-r3
  • xen Alpine 3.13 4.14.5-r0
  • xen Alpine 3.15, Alpine 3.14 4.15.2-r0
  • xen Alpine 3.24, Alpine 3.23, Alpine 3.22 +6 more 4.16.1-r0

alpine advisories ALPINE-CVE-2022-23033

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-23033 updated cvss 7.8

xen: arm: guest_physmap_remove_page not removing the p2m mappings (XSA-393)

  • Red Hat Enterprise Linux 5 kernel-xen
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Xen xen

Classification

Weakness
  • CWE-404 Improper Resource Shutdown or Release

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.