CVE-2025-27465
Last modified
CVE-2025-27465 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Certain instructions need intercepting and emulating by Xen. In some cases Xen emulates the instruction by replaying it, using an executable stub. EPSS estimates a 0.55% chance of exploitation in the next 30 days.
Description
Certain instructions need intercepting and emulating by Xen. In some cases Xen emulates the instruction by replaying it, using an executable stub. Some instructions may raise an exception, which is supposed to be handled gracefully. Certain replayed instructions have additional logic to set up and recover the changes to the arithmetic flags. For replayed instructions where the flags recovery logic is used, the metadata for exception handling was incorrect, preventing Xen from handling the the exception gracefully, treating it as fatal instead.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | >= 4.9.0 |
References
- https://xenbits.xenproject.org/xsa/advisory-470.htmlPatch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2025/07/01/1Mailing List, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-470.htmlPatch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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