Skip to content
CVE PROGRAM SOURCE RECORD6.8 Medium

CVE-2026-57025

Junos OS and Junos OS Evolved: EX Series, QFX Series, MX Series: A specific 'show l2-learning/ethernet-switching' command causes l2ald crash

Description

A Return of Pointer Value Outside of Expected Range vulnerability in the fileio library of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privilged attacker to cause a Denial-of-Service (DoS). On EX Series, QFX Series and MX Series a low-privileged attacker issuing a specific 'show l2-learning' or 'show ethernet-switching' command will cause an l2ald crash which will lead to a temporary service impact for all layer 2 services until the process has automatically restarted. This issue affects EX Series, QFX Series, MX Series: Junos OS: * all versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S7, * 24.2 versions before 24.2R2, * 24.4 versions before 24.4R1-S2. Junos OS Evolved: * all versions before 23.2R2-S7-EVO, * 23.4 versions before 23.4R2-S8-EVO, * 24.2 versions before 24.2R2-EVO, * 24.4 versions before 24.4R1-S3-EVO.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Juniper Networks Junos OS

Default version status: unaffected

  • 0 to < 23.2R2-S7affected
  • 23.4 to < 23.4R2-S7affected
  • 24.2 to < 24.2R2affected
  • 24.4 to < 24.4R1-S2affected

Juniper Networks Junos OS Evolved

Default version status: unaffected

  • 0 to < 23.2R2-S7-EVOaffected
  • 23.4 to < 23.4R2-S8-EVOaffected
  • 24.2 to < 24.2R2-EVOaffected
  • 24.4 to < 24.4R1-S3-EVOaffected

References