CVE-2026-101973: Junos OS: Malformed packet causes pkid denial of service when certificate re-enrollment is used
A NULL Pointer Dereference vulnerability in the pkid component of Juniper Networks Junos OS allows an unauthenticated remote attacker to cause a denial of service via a malformed packet received during CMP enrollment or automatic certificate re-enrollment.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Juniper Junos OSto a version that resolves this vulnerability.Fixed in 23.2R2-S7.7 - Upgrade
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Juniper Junos OSto a version that resolves this vulnerability.Fixed in 23.4R2-S8.13 - Upgrade
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Juniper Junos OSto a version that resolves this vulnerability.Fixed in 24.2R2-S5.5 - Upgrade
Upgrade
Juniper Junos OSto a version that resolves this vulnerability.Fixed in 24.4R2-S5 - Upgrade
Upgrade
Juniper Junos OSto a version that resolves this vulnerability.Fixed in 25.2R2-S2 - Upgrade
Upgrade
Juniper Junos OSto a version that resolves this vulnerability.Fixed in 25.4R1-S3 - Upgrade
Upgrade
Juniper Junos OSto a version that resolves this vulnerability.Fixed in 25.4R2 - Upgrade
Upgrade
Juniper Junos OSto a version that resolves this vulnerability.Fixed in 26.2R1-S2 - Upgrade
Upgrade
Juniper Junos OSto a version that resolves this vulnerability.Fixed in 26.2R2 - Upgrade
Upgrade
Juniper Junos OSto a version that resolves this vulnerability.Fixed in 26.4R1
Event History
Frequently Asked Questions
Which systems are exposed to this issue?
Junos OS systems that use CMP enrollment or automatic certificate re-enrollment are exposed to malformed packets processed by the pkid component.
What does an attacker need to exploit the vulnerability?
An attacker does not need authentication or user interaction. They need to send a malformed packet during CMP enrollment or automatic certificate re-enrollment.
What is the expected impact of a successful attack?
A successful attack can cause a denial of service in the pkid component. The provided severity vector indicates availability impact only, with no stated confidentiality or integrity impact.