CVE•Published 2026-05-19•Modified 2026-05-19•0 articles on news•5 live references•NVD data
CVE-2026-23557Xen · Xen
Vulnerability data via NVD (ingested)
CVSS v3.1
6.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS percentile
—
Weaknesses (CWE)
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.
Timeline
Published 2026-05-19
Modified 2026-05-19
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-23557Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Xen"Hosts Shodan identified as running Xen.
More intel sources (5)
Shodan report
vuln:CVE-2026-23557Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-23557Censys host search filtered to this CVE id.
grep.app
CVE-2026-23557Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-23557GitHub code search for direct mentions.
Google dork
"CVE-2026-23557" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-23557 on GitHub.
We haven't classified any articles referencing CVE-2026-23557 yet. The external references above still apply.