Vulnerability Description
When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://xenbits.xenproject.org/xsa/advisory-500.html
- http://www.openwall.com/lists/oss-security/2026/07/28/16
- http://xenbits.xen.org/xsa/advisory-500.html
FAQ
What is CVE-2026-62428?
CVE-2026-62428 is a vulnerability with a CVSS score of 7.8 (HIGH). When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is ...
How severe is CVE-2026-62428?
CVE-2026-62428 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-62428?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.