SB20260408178 - Function call with incorrect argument type in Junos OS Evolved

Security Bulletin ID SB20260408178

CSH Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Remote access

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Function call with incorrect argument type (CVE-ID: CVE-2026-33783)

CWE-ID: CWE-686 - Function Call With Incorrect Argument Type

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to function call with incorrect argument type error in the sensor interface. A remote user can cause a complete Denial of Service (DoS).

If colored SRTE policy tunnels are provisioned via PCEP, and gRPC is used to monitor traffic in these tunnels, evo-aftmand crashes and doesn't restart which leads to a complete and persistent service impact.

The system has to be manually restarted to recover.

Remediation

Install update from vendor's website.

References

https://supportportal.juniper.net/s/article/2026-04-Security-Bulletin-Junos-OS-Evolved-PTX-Series-If-SRTE-tunnels-provisioned-via-PCEP-are-present-and-specific-gRPC-queries-are-received-evo-aftman-crashes-CVE-2026-33783