Junos OS (SRX firewalls)
CVE-2024-39549: Receipt of malformed BGP path attributes leads to a memory leak
A Missing Release of Memory after Effective Lifetime vulnerability in the routing process daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a malformed BGP Path attribute update which allocates memory used to log the bad path attribute.
Published
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 0 | 21.2R3-S8 or later |
| Junos OS 21.4 | 21.4R3-S8 or later |
| Junos OS 22.2 | 22.2R3-S4 or later |
| Junos OS 22.3 | 22.3R3-S3 or later |
| Junos OS 22.4 | 22.4R3-S3 or later |
| Junos OS 23.2 | 23.2R2-S1 or later |
| Junos OS 23.4 | 23.4R1-S2, 23.4R2 or later |
| Junos OS Evolved 0 | 21.2R3-S8-EVO or later |
| Junos OS Evolved 21.4 | 21.4R3-S8-EVO or later |
| Junos OS Evolved 22.2 | 22.2R3-S4-EVO or later |
| Junos OS Evolved 22.3 | 22.3R3-S3-EVO or later |
| Junos OS Evolved 22.4 | 22.4R3-S3-EVO or later |
| Junos OS Evolved 23.2 | 23.2R2-S1-EVO or later |
| Junos OS Evolved 23.4 | 23.4R1-S2-EVO, 23.4R2-EVO or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A Missing Release of Memory after Effective Lifetime vulnerability in the routing process daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a malformed BGP Path attribute update which allocates memory used to log the bad path attribute. This memory is not properly freed in all circumstances, leading to a Denial of Service (DoS).
Consumed memory can be freed by manually restarting Routing Protocol Daemon (rpd).
Memory utilization could be monitored by: user@host> show system memory or show system monitor memory status
This issue affects:
Junos OS: * All versions before 21.2R3-S8, * from 21.4 before 21.4R3-S8,
- from 22.2 before 22.2R3-S4,
- from 22.3 before 22.3R3-S3,
- from 22.4 before 22.4R3-S3,
- from 23.2 before 23.2R2-S1,
- from 23.4 before 23.4R1-S2, 23.4R2.
Junos OS Evolved: * All versions before 21.2R3-S8-EVO, * from 21.4 before 21.4R3-S8-EVO, * from 22.2 before 22.2R3-S4-EVO, * from 22.3 before 22.3R3-S3-EVO, * from 22.4 before 22.4R3-S3-EVO,
- from 23.2 before 23.2R2-S1-EVO,
- from 23.4 before 23.4R1-S2-EVO, 23.4R2-EVO.
Workarounds
There are no known workarounds for this issue.
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 13 Oct 2026.