CVE-2026-23557Any guest can cause xenstored to crash by issuing a XS_RESET_WATCHES command within a transaction due to an assert() triggering.
Updated under an hour ago ()
Does this affect you?
It affects xen. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- Weakness (CWE)
- CWE-617
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
xen xen xen:xen | from 4.2.0 | NVD |
References
- https://xenbits.xenproject.org/xsa/advisory-484.htmlpatch, vendor-advisory
- http://www.openwall.com/lists/oss-security/2026/04/28/11mailing-list, patch, third-party-advisory
- http://xenbits.xen.org/xsa/advisory-484.htmlpatch, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.