Vulnerability · Published Nov 1, 2022 · Assigned by XEN
CVE-2022-42326
Medium 5.5
In plain English
A medium-severity memory leak 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 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Xenstore: Guests can create arbitrary number of nodes via transactions T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] In case a node has been created in a transaction and it is later deleted in the same transaction, the transaction will be terminated with an error. As this error is encountered only when handling the deleted node at transaction finalization, the transaction will have been performed partially and without updating the accounting information. This will enable a malicious guest to create arbitrary number of nodes.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | xen | 4.17.0-r0 | ALPINE-CVE-2022-42326 |
| Alpine:v3.21 | xen | 4.17.0-r0 | ALPINE-CVE-2022-42326 |
| Alpine:v3.22 | xen | 4.17.0-r0 | ALPINE-CVE-2022-42326 |
| Alpine:v3.23 | xen | 4.17.0-r0 | ALPINE-CVE-2022-42326 |
| Alpine:v3.24 | xen | 4.17.0-r0 | ALPINE-CVE-2022-42326 |
| Debian:12 | xen | 4.16.2+90-g0d39a6d1ae-1 | DEBIAN-CVE-2022-42326 |
| Debian:13 | xen | 4.16.2+90-g0d39a6d1ae-1 | DEBIAN-CVE-2022-42326 |
| Debian:14 | xen | 4.16.2+90-g0d39a6d1ae-1 | DEBIAN-CVE-2022-42326 |
| Ubuntu:22.04:LTS | xen | no fix listed | UBUNTU-CVE-2022-42326 |
| Ubuntu:24.04:LTS | xen | no fix listed | UBUNTU-CVE-2022-42326 |
| Ubuntu:25.10 | xen | no fix listed | UBUNTU-CVE-2022-42326 |
| Ubuntu:26.04:LTS | xen | no fix listed | UBUNTU-CVE-2022-42326 |
| Ubuntu:26.10 | xen | no fix listed | UBUNTU-CVE-2022-42326 |
Affected products (as reported)
Weakness: CWE-401 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://xenbits.xenproject.org/xsa/advisory-421.txt
- http://xenbits.xen.org/xsa/advisory-421.html
- [oss-security] 20221101 Xen Security Advisory 421 v2 (CVE-2022-42325,CVE-2022-42326) - Xenstore: Guests can create arbitrary number of nodes via transactions 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