Junos OS (SRX firewalls)
CVE-2026-102082: 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).
Published Juniper Networks advisory JSA112176
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Junos OS (SRX Series) 0 | 23.2R2-S5 or later |
| Junos OS (SRX Series) 23.4 | 23.4R2-S5 or later |
| Junos OS (SRX Series) 24.2 | 24.2R2-S2 or later |
| Junos OS (SRX Series) 24.4 | 24.4R2 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
In short
A flaw in the SSL plugin of Junos OS on SRX firewalls allows a network-based, unauthenticated attacker to trigger a Denial-of-Service condition. By sending a specifically malformed TLS message during a session-resumption attempt, the attacker causes an invalid pointer access that crashes the Packet Forwarding Engine. This results in a temporary loss of traffic forwarding until the system automatically recovers, requiring no user interaction or prior login.
Written by a language model from the vendor's description. Versions, fixes and exploitation status on this page come straight from the vendor and CISA.
The vendor's description
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.
Am I affected?
[ services ssl proxy <name> ]
Workarounds
Disable TLS 'session-resumption' to avoid PFE crashes by configuring:
[ services ssl proxy profile <profile> actions disable-session-resumption ]
Exploitation
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 19 Oct 2026.