Improper Exception Handling in Junos OS by Juniper Networks

CVE-2025-52948

What is CVE-2025-52948?

An improper handling of exceptional conditions vulnerability in the Berkeley Packet Filter (BPF) processing of Juniper Networks' Junos OS may allow an attacker to send specific, unknown traffic patterns that could lead to system instability. This issue is triggered by a rare timing issue within the Junos kernel when a BPF instance is cloned, which may result in critical internal structure leakage. Typically, this vulnerability manifests under certain configurations, most notably when packet capturing is enabled. In laboratory tests, specific traffic patterns have consistently demonstrated the potential to cause system crashes.

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