CVE-2026-101977

7.5High

Published 14 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash

7.5High

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Impact: High impact on availability
Weakness: CWE-476

Impact

A configured eBGP peer can crash the routing protocol daemon (rpd), causing a persistent denial of service. The attacker needs an established eBGP session to a target router that uses ephemeral configuration.

Root cause

A null pointer dereference occurs in rpd when processing a specific BGP packet on systems using ephemeral configuration.

Affected systems

Versions not listed — check the vendor advisory.

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fix & remediation

Upgrade to the patched Junos OS / Junos OS Evolved release specified in advisory JSA112187, or temporarily disable ephemeral configuration or untrusted eBGP peer sessions.

shell

$ show version

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

A NULL Pointer Dereference vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a configured eBGP peer to cause a persistent routing-daemon denial of service via a specific BGP packet when ephemeral configuration is used.

References

https://supportportal.juniper.net/JSA112187

Source: nvd.nist.gov/vuln/detail/CVE-2026-101977