Memory leak in Junos OS - CVE-2026-33775
Published: May 8, 2026
Vulnerability identifier: #VU130699
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33775
CWE-ID: CWE-401
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to missing release of memory after effective lifetime in the BroadBand Edge subscriber management daemon (bbe-smgd) when processing received packets with a mismatch between configured and received packet types. A remote attacker can send mismatched packets to cause a denial of service.
The issue occurs only when the authentication packet-types setting is configured inconsistently with the accepted packet type, and once memory available to bbe-smgd is exhausted, new subscribers cannot log in.
Affected software
Junos OS
How to mitigate CVE-2026-33775
Install security update from vendor's website.
Junos OS - addressed in versions 22.4R3-S8, 23.2R2-S5, 23.4R2-S6, 24.2R2-S2, 24.4R2, 25.2R2, 25.4R1