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Fencer Vulns
medium 5.6

CVE-2022-33748 json

lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path.

published 2022-10-11 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-36787

cvss
5.6
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 19%
public exploits
0
none known

Summary

lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path. While doing so, locking requirements were not paid attention to. As a result two cooperating guests granting each other transitive grants can cause locks to be acquired nested within one another, but in respectively opposite order. With suitable timing between the involved grant copy operations this may result in the locking up of a CPU.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.16.2+90-g0d39a6d1ae-1

debian advisories DEBIAN-CVE-2022-33748

  • xen SLES for SAP 12 SP4, SLES 12 SP4-LTSS, OpenStack Cloud Crowbar 9 +1 more 4.11.4_34-2.83.1
  • xen SLES 12 SP2-BCL 4.7.6_28-43.98.1
  • xen SLE Module for Server Applications 15 SP4, SLE Module for Basesystem 15 SP4, SLE Micro 5.3 +1 more 4.16.2_08-150400.4.16.1
  • xen SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +6 more 4.13.4_16-150200.3.65.1
  • xen SLE Module for Server Applications 15 SP3, SLE Module for Basesystem 15 SP3, SLE Micro 5.2 +3 more 4.14.5_08-150300.3.40.1
  • xen SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +3 more 4.12.4_30-150100.3.80.1
  • xen SLES for SAP 15, SLE High Performance Computing 15-LTSS, SLE High Performance Computing 15-ESPOS 4.10.4_40-150000.3.84.1
  • xen SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 4.12.4_28-3.77.1

suse advisories SUSE-SU-2022:4241-1SUSE-SU-2022:4051-1SUSE-SU-2022:4007-1SUSE-SU-2022:3971-1SUSE-SU-2022:3947-1SUSE-SU-2022:3928-1

  • xen openSUSE Tumbleweed 4.17.0_02-1.1

opensuse advisories openSUSE-SU-2024:12561-1

  • xen Alpine 3.15, Alpine 3.14 4.15.4-r0
  • xen Alpine 3.17, Alpine 3.16 4.16.3-r0
  • xen Alpine 3.24, Alpine 3.23, Alpine 3.22 +4 more 4.17.0-r0

alpine advisories ALPINE-CVE-2022-33748

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-2022-33748 updated cvss 5.6

xen: lock order inversion in transitive grant copy handling

  • Red Hat All currently supported Red Hat products
    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

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

Affected products

  • Xen xen

Classification

Weakness
  • CWE-755 Improper Handling of Exceptional Conditions

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.