{"schema":"threatline.record/2","record":{"id":"CVE-2025-39682","aliases":[],"summary":"Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability","details":"Linux Kernel contains an improper check for unusual or exceptional conditions vulnerability in the TLS receive path which allows a zero-length record retrieved from the rx_list to bypass the intended recvmsg() record-type handling, potentially causing subsequent TLS records to be processed using incorrect zero-copy and queuing assumptions. The impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.","categories":["Operating systems"],"product":"Kernel","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-39682","source_modified_at":"2026-10-07T17:56:14.826Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"lessThan":"2902c3ebcca52ca845c03182000e8d71d3a5196f","status":"affected","version":"84c61fe1a75b4255df1e1e7c054c9e6d048da417","versionType":"git"},{"lessThan":"c09dd3773b5950e9cfb6c9b9a5f6e36d06c62677","status":"affected","version":"84c61fe1a75b4255df1e1e7c054c9e6d048da417","versionType":"git"},{"lessThan":"3439c15ae91a517cf3c650ea15a8987699416ad9","status":"affected","version":"84c61fe1a75b4255df1e1e7c054c9e6d048da417","versionType":"git"},{"lessThan":"29c0ce3c8cdb6dc5d61139c937f34cb888a6f42e","status":"affected","version":"84c61fe1a75b4255df1e1e7c054c9e6d048da417","versionType":"git"},{"lessThan":"62708b9452f8eb77513115b17c4f8d1a22ebf843","status":"affected","version":"84c61fe1a75b4255df1e1e7c054c9e6d048da417","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-39682","source_modified_at":"2026-10-07T17:56:14.826Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"status":"affected","version":"6.0"},{"lessThan":"6.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.149","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.103","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.44","versionType":"semver"},{"lessThanOrEqual":"6.16.*","status":"unaffected","version":"6.16.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.17","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-39682","source_modified_at":"2026-10-07T17:56:14.826Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"2902c3ebcca52ca845c03182000e8d71d3a5196f","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-39682","source_modified_at":"2026-10-07T17:56:14.826Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"3439c15ae91a517cf3c650ea15a8987699416ad9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-39682","source_modified_at":"2026-10-07T17:56:14.826Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"29c0ce3c8cdb6dc5d61139c937f34cb888a6f42e","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-39682","source_modified_at":"2026-10-07T17:56:14.826Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"62708b9452f8eb77513115b17c4f8d1a22ebf843","basis":"first unaffected version stated in the CVE record"}],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"date_added":"2026-09-18","due_date":"2026-09-21","required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","ransomware_campaign_use":"Unknown","forensic_triage":true},"epss":{"probability":0.0288,"percentile":0.86761,"score_date":"2026-10-23"},"published_at":"2025-09-05T17:20:48.657Z","modified_at":"2026-10-07T17:56:14.826Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2025-39682","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-07T17:56:14.826Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2025-39682","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/2902c3ebcca52ca845c03182000e8d71d3a5196f"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c09dd3773b5950e9cfb6c9b9a5f6e36d06c62677"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/3439c15ae91a517cf3c650ea15a8987699416ad9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/29c0ce3c8cdb6dc5d61139c937f34cb888a6f42e"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/62708b9452f8eb77513115b17c4f8d1a22ebf843"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39682","source":"CISA KEV"},{"source":"CVE List","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"source":"CVE List","url":"https://cert-portal.siemens.com/productcert/html/ssa-032379.html"},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-39682","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2026-09-19T03:56:25.358027Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"vendor and product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-07T17:56:14.826Z","content_hash":"092a45544942b87dc309a4e056c5dd4e4c9169285cbd0f42512f08ab8c9a2a73"}}