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Resolved Issues

Learn about the issues fixed in this release for QFX Series switches.

For the most complete and latest information about known Junos OS defects, use the Juniper Networks online Junos Problem Report Search application.

EVPN

  • Inter-VLAN routed traffic failure observed after AS number change. PR1925825

Layer 2 Ethernet Services

  • Junos OS and Junos OS Evolved: DHCP Option 82 messages from clients being passed unmodified to the DHCP server (CVE-2025-59960). PR1876407

  • Junos OS and Junos OS Evolved: Unix socket used to control the jdhcpd process is world-writable (CVE-2025-59961). PR1877468

Platform and Infrastructure

  • TCP listening sockets are not displayed correctly. PR1864027

  • JUNOS_REG: QFX51200-48YM: Fan status output was not same after/before device vc-switch over. PR1758400

  • On QFX5120-48YM port remains down when speed shifts from 1G to 10G. PR1845045

  • Junos OS: EX4k Series, QFX5k Series: In an EVPN-VXLAN configuration link flaps cause Inter-VNI traffic drop (CVE-2026-21910). PR1847849

  • [QFX5120-32C] LEDs do not work properly with QSFP or without optics. PR1855372

  • The dcpfe process crashes on specific Junos QFX and EX platforms due to memory corruption. PR1856424

  • Enabling FIPS, committing the config, with performing a reboot triggers a boot loop. PR1856855

  • The cpu-utilization-idle and temperature-cpu properties for FPC are not present on QFX-Series devices. PR1864591

  • The PTP packets are dropped when IGMP snooping is enabled. PR1873129

  • Transit unicast ARP requests are dropped instead of being forwarded. PR1878555

  • JMA package fails to initialise after a power cycle on EX4650/QFX-5E series devices. PR1882472

  • Error messages "LBCM-L2,brcm_port_family_detach(),8814:IFF detach failed for IFD esi IFL xxxxxx with err -1" will be observed on Junos QFX5k and EX4k Platforms. PR1883866

  • Next-hop entries are not getting programmed in ECMP unilist group after device upgrade. PR1886612

  • snmp mib walk DomCurrentLaneAlarms does not show proper lanes Values in the latest builds. PR1886889

  • QFX5120 - SFP+ Modules disappear/down post upgrade. PR1890867

  • PFE crash observed during VXLAN classifier unbind or EZ-LAG commit operations. PR1894833

  • Traffic loss will be observed when VPLAG is configured on Junos QFX5k and EX4k platforms. PR1895903

  • qfx5120-48y-8c/23.4R2-S3.9/Flooding back GARP BUM traffic towards source. PR1897459

  • Significant system slowness is observed post software upgrade on QFX5120-48YM. PR1902869

  • The dcpfe process crash seen upon insertion of dual-speed 10/25G optics on EX4650. PR1908340

  • EVPN traffic blackholing occurs when re-ARP uses VGA IP with IRB MAC in dual-homed LAG setups. PR1909786

  • Device crash when executing "show topology address" with invalid Input from VTY mode. PR1909975

  • EVPN routes are stuck in the KRT queue. PR1913519

  • Enhanced Loop Detect vlan-id all option now available for EX4650 and . PR1919868

  • DC-PFE Core due to Concurrent Filter Reprogramming and VTY Command Execution. PR1924654

Routing Protocols

  • EBGP MULTIPATH is not set on ACTIVE route. PR1877332

  • Junos OS and Junos OS Evolved: BGP update with a set of specific attributes causes rpd crash (CVE-2025-60003). PR1878812

  • Junos OS and Junos OS Evolved: Optional transitive BGP attribute is modified before propagation to peers causing sessions to flap (CVE-2025-60011). PR1884492