CVE-2026-57029
EUVD-2026-4271809.07.2026, 22:17
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.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| juniper | junos_os_evolved | 23.2 |
| juniper | junos_os_evolved | 23.4 |
| juniper | junos_os_evolved | 23.4:r1 |
| juniper | junos_os_evolved | 23.4:r1-s1 |
| juniper | junos_os_evolved | 23.4:r1-s2 |
| juniper | junos_os_evolved | 23.4:r2 |
| juniper | junos_os_evolved | 23.4:r2-s1 |
| juniper | junos_os_evolved | 23.4:r2-s2 |
| juniper | junos_os_evolved | 23.4:r2-s3 |
| juniper | junos_os_evolved | 23.4:r2-s4 |
| juniper | junos_os_evolved | 23.4:r2-s5 |
| juniper | junos_os_evolved | 23.4:r2-s6 |
| juniper | junos_os_evolved | 24.2 |
| juniper | junos_os_evolved | 24.2:r1 |
| juniper | junos_os_evolved | 24.2:r1-s2 |
| juniper | junos_os_evolved | 24.2:r2 |
| juniper | junos_os_evolved | 24.2:r2-s1 |
| juniper | junos_os_evolved | 24.2:r2-s2 |
| juniper | junos_os_evolved | 24.2:r2-s3 |
| juniper | junos_os_evolved | 24.2:r2-s4 |
| juniper | junos_os_evolved | 24.4 |
| juniper | junos_os_evolved | 24.4:r1 |
| juniper | junos_os_evolved | 24.4:r1-s2 |
| juniper | junos_os_evolved | 24.4:r1-s3 |
| juniper | junos_os_evolved | 24.4:r2 |
| juniper | junos_os_evolved | 24.4:r2-s1 |
| juniper | junos_os_evolved | 24.4:r2-s2 |
| juniper | junos_os_evolved | 25.2 |
| juniper | junos_os_evolved | 25.2:r1 |
| juniper | junos_os_evolved | 25.2:r1-s1 |
| juniper | junos_os_evolved | 25.2:r1-s2 |
𝑥
= Vulnerable software versions
Common Weakness Enumeration