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Fencer Vulns
medium 6.5

CVE-2022-42319 json

Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might need to allocate qui…

published 2022-11-01 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-45394

cvss
6.5
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 22%
public exploits
0
none known

Summary

Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might need to allocate quite large amounts of memory temporarily. This memory is freed only after the request has been finished completely. A request is regarded to be finished only after the guest has read the response message of the request from the ring page. Thus a guest not reading the response can cause xenstored to not free the temporary memory. This can result in memory shortages causing Denial of Service (DoS) of xenstored.

Patch / fix

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

debian advisories DEBIAN-CVE-2022-42319

  • xen SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 4.12.4_30-3.82.1
  • xen SLES for SAP 12 SP4, SLES 12 SP4-LTSS, OpenStack Cloud Crowbar 9 +1 more 4.11.4_34-2.83.1
  • 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 SLES 12 SP3-BCL 4.9.4_34-3.114.1
  • 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

suse advisories SUSE-SU-2022:4332-1SUSE-SU-2022:4241-1SUSE-SU-2022:4007-1SUSE-SU-2022:3971-1SUSE-SU-2022:3960-1SUSE-SU-2022:3947-1

  • 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-2022-42319

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

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Affected products

  • Xen xen

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime

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.