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CVE-2026-57029

6.0 medium SSVC exploitation: none Analyzed
NVD · CVE.org

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

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 6.0 · juniperNVD modified 2026-10-25 15:10

Affected (CPE criteria) 31

  • cpe:2.3:o:juniper:junos_os_evolved:23.2:*:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:23.4:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:23.4:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:23.4:r1-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:23.4:r1-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:23.4:r2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:23.4:r2-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:23.4:r2-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:23.4:r2-s3:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:23.4:r2-s4:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:23.4:r2-s5:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:23.4:r2-s6:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.2:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.2:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.2:r1-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.2:r2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.2:r2-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.2:r2-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.2:r2-s3:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.2:r2-s4:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.4:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.4:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.4:r1-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.4:r1-s3:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.4:r2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.4:r2-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:24.4:r2-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:25.2:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:25.2:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:25.2:r1-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos_os_evolved:25.2:r1-s2:*:*:*:*:*:*

References 1