{"cve":"CVE-2025-21826","nvd":{"published":"2025-03-06T16:15:54.863","modified":"2026-07-30T06:21:39.467","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: reject mismatching sum of field_len with set key length\n\nThe field length description provides the length of each separated key\nfield in the concatenation, each field gets rounded up to 32-bits to\ncalculate the pipapo rule width from pipapo_init(). The set key length\nprovides the total size of the key aligned to 32-bits.\n\nRegister-based arithmetics still allows for combining mismatching set\nkey length and field length description, eg. set key length 10 and field\ndescription [ 5, 4 ] leading to pipapo width of 12.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/1b9335a8000fb70742f7db10af314104b6ace220","https://git.kernel.org/stable/c/2ac254343d3cf228ae0738b2615fedf85d000752","https://git.kernel.org/stable/c/49b7182b97bafbd5645414aff054b4a65d05823d","https://git.kernel.org/stable/c/5083a7ae45003456c253e981b30a43f71230b4a3","https://git.kernel.org/stable/c/6b467c8feac759f4c5c86d708beca2aa2b29584f"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:00:17.429720821+00:00"},"epss":{"cve":"CVE-2025-21826","score":0.002,"percentile":0.09908,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}