Improper handling of exceptional conditions in Juniper Junos OS - CVE-2025-52948
Published: July 18, 2025
Vulnerability identifier: #VU113061
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-52948
CWE-ID: CWE-755
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Juniper Networks, Inc.
Affected software:
Juniper Junos OS
Juniper Junos OS
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper handling of exceptional conditions error in Berkeley Packet Filter (BPF) processing. A remote non-authenticated attacker can cause the FPC and system to crash and restart.
BPF provides a raw interface to data link layers in a protocol independent fashion.
Internally within the Junos kernel, due to a rare timing issue (race condition), when a BPF instance is cloned, the newly created interface causes an internal structure leakage, leading to a system crash.
How to mitigate CVE-2025-52948
Install updates from vendor's website.