CVE-2022-33748
lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path.…
- 5.6MediumCVSS base score
- 0.27%Exploitation in 30 daysEPSS · top 80% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path. While doing so, locking requirements were not paid attention to. As a result two cooperating guests granting each other transitive grants can cause locks to be acquired nested within one another, but in respectively opposite order. With suitable timing between the involved grant copy operations this may result in the locking up of a CPU.
Timeline
ID reserved
By XEN
- 4 months later
· 4 months later
Published
- 22 months later
· 22 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 | Medium5.6 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.27% · top 80% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.6.
Affected products
References
References8
- https://xenbits.xenproject.org/xsa/advisory-411.txt (opens in a new tab)x_transferred
- http://xenbits.xen.org/xsa/advisory-411.html (opens in a new tab)x_transferred
- [oss-security] 20221011 Xen Security Advisory 411 v3 (CVE-2022-33748) - lock order inversion in transitive grant copy handling (opens in a new tab)mailing-listx_transferred
- FEDORA-2022-5b594b82ac (opens in a new tab)vendor-advisoryx_transferred
- DSA-5272 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-d80cc73088 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-99af00f60e (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)
- EUVD EUVD-2022-36787 (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://cveledger.app/cve/CVE-2022-33748)Record last updated .