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I. Basic Information for CVE-2025-21745
Vulnerability Information

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Vulnerability Title
blk-cgroup: Fix class @block_class's subsystem refcount leakage
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix class @block_class's subsystem refcount leakage blkcg_fill_root_iostats() iterates over @block_class's devices by class_dev_iter_(init|next)(), but does not end iterating with class_dev_iter_exit(), so causes the class's subsystem refcount leakage. Fix by ending the iterating with class_dev_iter_exit().
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
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞,该漏洞源于blk-cgroup中未正确结束设备迭代,导致子系统引用计数泄漏。
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
VendorProductAffected VersionsCPESubscribe
LinuxLinux ef45fe470e1e5410db4af87abc5d5055427945ac ~ ffb494f1e7a047bd7a41b13796fcfb08fe5beafb -
LinuxLinux 5.9 -
II. Public POCs for CVE-2025-21745
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III. Intelligence Information for CVE-2025-21745
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IV. Related Vulnerabilities
V. Comments for CVE-2025-21745

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