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I. Basic Information for CVE-2025-21826
Vulnerability Information

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Vulnerability Title
netfilter: nf_tables: reject mismatching sum of field_len with set key length
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: reject mismatching sum of field_len with set key length The field length description provides the length of each separated key field in the concatenation, each field gets rounded up to 32-bits to calculate the pipapo rule width from pipapo_init(). The set key length provides the total size of the key aligned to 32-bits. Register-based arithmetics still allows for combining mismatching set key length and field length description, eg. set key length 10 and field description [ 5, 4 ] leading to pipapo width of 12.
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nf_tables拒绝字段长度与集合密钥长度不匹配的情况。
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 2d4c0798a1ef8db15b3277697ac2def4eda42312 ~ 6b467c8feac759f4c5c86d708beca2aa2b29584f -
LinuxLinux 6.8 -
II. Public POCs for CVE-2025-21826
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III. Intelligence Information for CVE-2025-21826
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IV. Related Vulnerabilities
V. Comments for CVE-2025-21826

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