PT-2026-56983 · Juniper Networks · Junos Evolved
Published
2026-07-09
·
Updated
2026-07-09
·
CVE-2026-57029
CVSS v3.1
5.3
Medium
| Vector | AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
A Missing Synchronization vulnerability in the flow collector handler of Juniper Networks Junos OS Evolved on QFX Series allows an adjacent, unauthenticated attacker to cause a Denial-of-Service (DoS).
When the reachability of an sFlow collector changes, the corresponding next-hop entry is updated. If this update occurs simultaneously with the sFlow thread accessing the next-hop data (which is outside the attackers control), it causes the evo-pfemand process to crash, impacting all traffic forwarding until the automatic process restart has completed.
This issue affects Junos OS Evolved on QFX Series:
- all 23.2 versions,
- 23.4 versions before 23.4R2-S7-EVO,
- 24.2 versions before 24.2R2-S5-EVO,
- 24.4 versions before 24.4R2-S3-EVO,
- 25.2 versions before 25.2R2-EVO.
Fix
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Weakness Enumeration
Related Identifiers
Affected Products
Junos Evolved