{"cve":"CVE-2025-40279","nvd":{"published":"2025-12-06T22:15:55.843","modified":"2026-10-15T19:10:00.173","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: act_connmark: initialize struct tc_ife to fix kernel leak\n\nIn tcf_connmark_dump(), the variable 'opt' was partially initialized using a\ndesignatied initializer. While the padding bytes are reamined\nuninitialized. nla_put() copies the entire structure into a\nnetlink message, these uninitialized bytes leaked to userspace.\n\nInitialize the structure with memset before assigning its fields\nto ensure all members and padding are cleared prior to beign copied.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/218b67c8c8246d47a2a7910eae80abe4861fe2b7","https://git.kernel.org/stable/c/25837889ec062f2b7618142cd80253dff3da5343","https://git.kernel.org/stable/c/31e4aa93e2e5b5647fc235b0f6ee329646878f9e","https://git.kernel.org/stable/c/51cb05d4fd632596816ba44e882e84db9fb28a7e","https://git.kernel.org/stable/c/62b656e43eaeae445a39cd8021a4f47065af4389"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:16:40.427100871+00:00"},"epss":{"cve":"CVE-2025-40279","score":0.00197,"percentile":0.09282,"date":"2026-10-25"},"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."]}