Junos OS: SRX Series: A high volume of DNS traffic over TCP can lead to a flowd crash
A Use After Free vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). When web filtering for TCP traffic is configured, a high volume of DNS requests increases the likelihood of a flowd crash and restart, which leads to a complete service outage until the service has automatically recovered. This is a race condition outside the attacker's direct control. This issue affects Junos OS on SRX Series: * All versions before 23.2R2-S5; * from 23.4 before 23.4R2-S6; * from 24.2 before 24.2R2-S3; * from 24.4 before 24.4R2-S1; * from 25.2 before 25.2R1-S1, 25.2R2.
CVE-2026-102078
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-102078
Junos OS
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Juniper Networks",
"product": "Junos OS",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "23.2R2-S5",
"versionType": "custom"
},
{
"status": "affected",
"version": "23.4",
"lessThan": "23.4R2-S6",
"versionType": "custom"
},
{
"status": "affected",
"version": "24.2",
"lessThan": "24.2R2-S3",
"versionType": "custom"
},
{
"status": "affected",
"version": "24.4",
"lessThan": "24.4R2-S1",
"versionType": "custom"
},
{
"status": "affected",
"version": "25.2",
"lessThan": "25.2R1-S1, 25.2R2",
"versionType": "custom"
}
],
"platforms": [
"SRX Series"
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-102078
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #23186 · Revision 1
- Added to Heist Feed
- Publisher date