{"id":"CVE-2025-40279","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-40279","generatedAt":"2026-10-28T09:41:36.590Z","title":"In the Linux kernel, the following vulnerability has been resolved: net: sched: act_connmark: initialize struct tc_ife to fix kernel leak In tcf_connmark_dump(), the variable 'opt' was partially initialized using a designatied initializer.","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.","published":"2025-12-06T22:15:56.000Z","lastModified":"2026-10-15T19:10:00.000Z","status":"Deferred","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":null,"cwe":[],"affected":[],"epss":{"score":0.00197,"percentile":0.093,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"unknown","text":"Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/218b67c8c8246d47a2a7910eae80abe4861fe2b7","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/25837889ec062f2b7618142cd80253dff3da5343","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/31e4aa93e2e5b5647fc235b0f6ee329646878f9e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/51cb05d4fd632596816ba44e882e84db9fb28a7e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/62b656e43eaeae445a39cd8021a4f47065af4389","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/73cc56c608c209d3d666cc571293b090a471da70","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-40279","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}