Junos OS (SRX firewalls)
CVE-2024-47494: Due to a race condition AgentD process causes a memory corruption and FPC reset
A Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in the AgentD process of Juniper Networks Junos OS allows an attacker who is already causing impact to established sessions which generates counter changes picked up by the AgentD process during telemetry polling, to move the AgentD process into a state where AgentD attempts to reap an already destroyed sensor.
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 | 21.4R3-S9 or later |
| Junos OS 22.2 | 22.2R3-S5 or later |
| Junos OS 22.3 | 22.3R3-S4 or later |
| Junos OS 22.4 | 22.4R3-S3 or later |
| Junos OS 23.2 | 23.2R2-S2 or later |
| Junos OS 23.4 | 23.4R2 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in the AgentD process of Juniper Networks Junos OS allows an attacker who is already causing impact to established sessions which generates counter changes picked up by the AgentD process during telemetry polling, to move the AgentD process into a state where AgentD attempts to reap an already destroyed sensor. This reaping attempt then leads to memory corruption causing the FPC to crash which is a Denial of Service (DoS).
The FPC will recover automatically without user intervention after the crash. This issue affects Junos OS:
- All versions before 21.4R3-S9
- From 22.2 before 22.2R3-S5,
- From 22.3 before 22.3R3-S4,
- From 22.4 before 22.4R3-S3,
- From 23.2 before 23.2R2-S2,
- From 23.4 before 23.4R2.
This issue does not affect Junos OS Evolved.
Am I affected?
The following minimal configuration is required for exposure: [services analytics]
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.