cve 2025 39682

CVE-2025-39682 is a remotely triggerable Linux kernel flaw in the kernel TLS receive path, tracked here through coverage of its addition to CISA's Known Exploited Vulnerabilities catalog. The tagged content focuses on the operational response: evidence of active exploitation, a September 21, 2026 federal remediation deadline, and guidance that organizations running internet-facing Linux services treat that date as an incident-response deadline rather than a routine patch cycle. Because the flaw sits in net/tls receive handling, the discussion centers on patching kTLS promptly, assessing exposure, and prioritizing remediation for Linux systems that face the internet.