Return of pointer value outside of expected range in Junos OS and Junos OS Evolved - CVE-2026-57025
Published: July 8, 2026
Vulnerability identifier: #VU137146
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-57025
CWE-ID: CWE-466
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Juniper Networks, Inc.
Affected software:
Junos OS
Junos OS Evolved
Junos OS
Junos OS Evolved
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to return of pointer value outside of expected range error in the fileio library. A local user can cause a Denial-of-Service (DoS).
On EX Series, QFX Series and MX Series a low-privileged attacker issuing a specific 'show l2-learning' 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.
How to mitigate CVE-2026-57025
Install updates from vendor's website.