CVE-2026-23557— Xenstored DoS via XS_RESET_WATCHES command
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-23557
Vulnerability Information
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Vulnerability Title
Xenstored DoS via XS_RESET_WATCHES command
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Xen 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Xen是Xen开源的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen存在安全漏洞，该漏洞源于在处理事务中的XS_RESET_WATCHES命令时触发assert()，可能导致崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-23557
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Vendor Advisories for CVE-2026-23557 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-23557
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