## [悪用確認] CVE-2025-39682: Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability

- 種別: advisory
- 重大度: critical
- CVE: CVE-2025-39682
- 公開日時: 2026-09-18T00:00:00.000Z
- 情報源: CISA Known Exploited Vulnerabilities (https://nvd.nist.gov/vuln/detail/CVE-2025-39682)
- パーマリンク: https://vulnpulse.app/items/cisa-kev-cve-2025-39682

Linux Kernel
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.
対応: 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. (期限 2026-09-21)