CVE-2026-57029 (GCVE-0-2026-57029)
Vulnerability from cvelistv5
Published
2026-07-09 21:12
Modified
2026-07-10 14:45
Severity ?
5.3 (Medium) - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
6.0 (Medium) - CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/RE:M
CWE
  • CWE-820 - Missing Synchronization
Summary
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.
References
Impacted products
Vendor Product Version
Juniper Networks Junos OS Evolved Version: 0   < 23.4R2-S7-EVO
Version: 24.2   < 24.2R2-S5-EVO
Version: 24.4   < 24.4R2-S3-EVO
Version: 25.2   < 25.2R2-EVO
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