Vulnerability · Published Nov 1, 2022 · Assigned by XEN
CVE-2022-42321
Medium 6.5
In plain English
A medium-severity security flaw in xen from Xen. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)0.3%top 77.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | xen | 4.17.0-r0 | ALPINE-CVE-2022-42321 |
| Alpine:v3.21 | xen | 4.17.0-r0 | ALPINE-CVE-2022-42321 |
| Alpine:v3.22 | xen | 4.17.0-r0 | ALPINE-CVE-2022-42321 |
| Alpine:v3.23 | xen | 4.17.0-r0 | ALPINE-CVE-2022-42321 |
| Alpine:v3.24 | xen | 4.17.0-r0 | ALPINE-CVE-2022-42321 |
| Debian:12 | xen | 4.16.2+90-g0d39a6d1ae-1 | DEBIAN-CVE-2022-42321 |
| Debian:13 | xen | 4.16.2+90-g0d39a6d1ae-1 | DEBIAN-CVE-2022-42321 |
| Debian:14 | xen | 4.16.2+90-g0d39a6d1ae-1 | DEBIAN-CVE-2022-42321 |
| Ubuntu:22.04:LTS | xen | no fix listed | UBUNTU-CVE-2022-42321 |
| Ubuntu:24.04:LTS | xen | no fix listed | UBUNTU-CVE-2022-42321 |
| Ubuntu:25.10 | xen | no fix listed | UBUNTU-CVE-2022-42321 |
| Ubuntu:26.04:LTS | xen | no fix listed | UBUNTU-CVE-2022-42321 |
| Ubuntu:26.10 | xen | no fix listed | UBUNTU-CVE-2022-42321 |
Affected products (as reported)
References
- https://xenbits.xenproject.org/xsa/advisory-418.txt
- http://xenbits.xen.org/xsa/advisory-418.html
- [oss-security] 20221101 Xen Security Advisory 418 v2 (CVE-2022-42321) - Xenstore: Guests can crash xenstored via exhausting the stack mailing-list
- DSA-5272 vendor-advisory
- FEDORA-2022-07438e12df vendor-advisory
- FEDORA-2022-99af00f60e vendor-advisory
- FEDORA-2022-9f51d13fa3 vendor-advisory
- GLSA-202402-07 vendor-advisory