CVE-2026-23557
Xenstored DoS via XS_RESET_WATCHES command
- State
- Published
- Severity
- 6.5 Medium
- Published
- May 19, 2026
- Updated
- May 19, 2026
- Reserved
- Jan 14, 2026
Description
Any guest can cause xenstored to crash by issuing a XS_RESET_WATCHES command within a transaction due to an assert() triggering.
In case xenstored was built with NDEBUG #defined nothing bad will happen, as assert() is doing nothing in this case. Note that the default is not to define NDEBUG for xenstored builds even in release builds of Xen.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H | CISA-ADP |
Weaknesses
- CWE-617 Reachable Assertion
Affected Products
| Product | Versions |
|---|---|
XenXen |
|
References
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