CVE-2026-102082: Junos OS: SRX Series: If TLS session resumption is configured and a specific TLS message is received a PFE crash occurs
An Improper Handling of Missing Special Element vulnerability in the SSL plugin of Juniper Networks Junos OS on SRX Series allows a network-based, unauthenticated attacker to cause a Denial-of-Service (DoS).
This issue is will occur when 'ssl-proxy' is configured on SRX platforms and during a TLS session-resumption attempt a specifically malformed TLS message is received. This results in an invalid pointer access and PFE crash which causes a temporary loss of traffic forwarding until the PFE automatically recovers. The exact internal timing to trigger this issue is outside the attacker's direct control.This issue affects Junos OS on SRX Series:
All versions before 23.2R2-S5; 23.4 versions before 23.4R2-S5; 24.2 versions before 24.2R2-S2; 24.4 versions before 24.4R2.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Juniper Junos OS on SRX Seriesto a version that resolves this vulnerability.Fixed in 23.2R2-S5 - Upgrade
Upgrade
Juniper Junos OS on SRX Seriesto a version that resolves this vulnerability.Fixed in 23.4R2-S5 - Upgrade
Upgrade
Juniper Junos OS on SRX Seriesto a version that resolves this vulnerability.Fixed in 24.2R2-S2 - Upgrade
Upgrade
Juniper Junos OS on SRX Seriesto a version that resolves this vulnerability.Fixed in 24.4R2 - Upgrade
Upgrade
Juniper Junos OS on SRX Seriesto a version that resolves this vulnerability.Fixed in 25.2R1
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
SRX Series devices are affected when ssl-proxy is configured and TLS session resumption is in use. Affected releases are all versions before 23.2R2-S5, 23.4 releases before 23.4R2-S5, 24.2 releases before 24.2R2-S2, and 24.4 releases before 24.4R2.
What does an attacker need to do to trigger the denial of service?
An unauthenticated network-based attacker must send a specifically malformed TLS message during a TLS session-resumption attempt. Triggering the issue depends on internal timing that is outside the attacker's direct control.
What is the operational impact of successful exploitation?
The malformed message can cause an invalid pointer access and crash the Packet Forwarding Engine (PFE). Traffic forwarding is temporarily lost until the PFE automatically recovers.