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TI-2022-20538 Aliases CVE-2022-42322GHSA-cq56-j359-2484

Memory leak in xen

Priority LOW 25CWE-401Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-401.

Summary

Xenstore: Cooperating guests can create arbitrary numbers of nodes T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Since the fix of XSA-322 any Xenstore node owned by a removed domain will be modified to be owned by Dom0. This will allow two malicious guests working together to create an arbitrary number of Xenstore nodes. This is possible by domain A letting domain B write into domain A's local Xenstore tree. Domain B can then create many nodes and reboot. The nodes created by domain B will now be owned by Dom0. By repeating this process over and over again an arbitrary number of nodes can be created, as Dom0's number of nodes isn't limited by Xenstore quota.

Why it matters now

EPSS 0.00306 23rd percentileScored 2026-11-08
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Xenxen——No fix listedCNA
  • xen VendorXen Affected — Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*not specified by NVDVulnerableXen
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*35VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*36VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*37VulnerableFedoraproject
  • cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Xen
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
  • cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    xen — FEDORA-2022-9f51d13fa3

    19 records Highest priority Priority LOW 19 LOW

    Other records, highest priority first

    • TI-2022-20525 Xenstore: Guests can crash xenstored Due to a bug in the fix of XSA-115 a malicious guest…Priority LOW 38
    • TI-2022-20543 Improper access control in xenPriority LOW 33
    • TI-2022-20536 Xenstore: Guests can get access to Xenstore nodes of deleted domains Access rights of…Priority LOW 33
    Show all 19 records → Advisory →
  • Advisory ·

    xen — FEDORA-2022-07438e12df

    19 records Highest priority Priority LOW 19 LOW

    Other records, highest priority first

    • TI-2022-20525 Xenstore: Guests can crash xenstored Due to a bug in the fix of XSA-115 a malicious guest…Priority LOW 38
    • TI-2022-20543 Improper access control in xenPriority LOW 33
    • TI-2022-20536 Xenstore: Guests can get access to Xenstore nodes of deleted domains Access rights of…Priority LOW 33
    Show all 19 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-42322
  2. 2026-10-03 Alias added: GHSA-cq56-j359-2484

References

Patch 3

Advisory 5

  • TI-2012-00210 The x86-64 kernel system-call functionality in Xen 4.1.2 and earlier, as used in Citrix… CVSS 2.0HIGH 7.2
  • TI-2023-07042 Information disclosure through error messages in AMD Ryzen™ 3000 Series Desktop… CVSS 3.1MEDIUM 5.5
  • TI-2015-04333 The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used… CVSS 2.0HIGH 9.3
  • TI-2015-06741 The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows… CVSS 3.1CRITICAL 10.0
  • TI-2018-06436 A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures… CVSS 3.0HIGH 7.8
  • TI-2024-20522 x86: Incorrect logic for BTC/SRSO mitigations CVSS 3.1HIGH 7.5
See all 489 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences