CVE-2022-42319
Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might need to allocate…
- Published
- Updated
- Reserved
- Assigned by
- XEN
Description
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.
Timeline
ID reserved
By XEN
- 29 days later
· 29 days later
Published
- 21 months later
· 21 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.30% · top 78% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
References (8)
- https://xenbits.xenproject.org/xsa/advisory-416.txt (opens in a new tab)x_transferred
- http://xenbits.xen.org/xsa/advisory-416.html (opens in a new tab)x_transferred
- [oss-security] 20221101 Xen Security Advisory 416 v2 (CVE-2022-42319) - Xenstore: Guests can cause Xenstore to not free temporary memory (opens in a new tab)mailing-listx_transferred
- DSA-5272 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-07438e12df (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-99af00f60e (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-9f51d13fa3 (opens in a new tab)vendor-advisoryx_transferred
- GLSA-202402-07 (opens in a new tab)vendor-advisoryx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-42319)Record last updated .