TI-2022-20537 Aliases CVE-2022-42321 GHSA-fwfg-5hqv-4r78

Uncontrolled recursion in xen

LOW 29CWE-674Published 2022-11-01 · Updated 2024-08-03

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-674.

Summary

Xenstore: Guests can crash xenstored via exhausting the stack Xenstored is using recursion for some Xenstore operations (e.g. for deleting a sub-tree of Xenstore nodes). With sufficiently deep nesting levels this can result in stack exhaustion on xenstored, leading to a crash of xenstored.

Why it matters now

EPSS 0.00297 22nd 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

Vendor	Product	Affected versions	Fixed in	Status	Source
Xen	xen	—	—	No fix listed	CNA

xen VendorXen Affected — Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPE	Versions	Role	Vendor
cpe:2.3:o:xen:xen:-:::::::*	not specified by NVD	Vulnerable	Xen
cpe:2.3:o:debian:debian_linux:11.0:::::::*	11.0	Vulnerable	Debian
cpe:2.3:o:fedoraproject:fedora:35:::::::*	35	Vulnerable	Fedoraproject
cpe:2.3:o:fedoraproject:fedora:36:::::::*	36	Vulnerable	Fedoraproject
cpe:2.3:o:fedoraproject:fedora:37:::::::*	37	Vulnerable	Fedoraproject

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 · 2022-11-01
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 · 2022-11-01
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

2026-10-02 Threatist record created from CVE-2022-42321
2026-10-03 Alias added: GHSA-fwfg-5hqv-4r78

References

Patch 2

Advisory 6

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