CVE-2026-57030

A Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') 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). As part of the stateful traffic processing on SRX Series devices flows are being established, and removed when not needed anymore. During the removal process the timeout of a flow should be set to 3 seconds and consequentially the flow should be removed shortly after. Due to a race condition occurring when setting the timeout there is a chance (the exact conditions are outside the attackers control) that the timeout is instead set to a very high value of larger than 10,000 seconds: user@host> show security flow session | match timeout Session ID: 98784248524, Policy name: PROD-FLOW/4, HA State: Active, Timeout: 85250, Session State: Valid This will lead to an accumulation of flows which can be observed by an ever-increasing value of invalidated sessions in the output of 'show security flow session summary': user@host> show security flow session summary | match invalid Invalidated sessions: 216931These sessions can't be cleared manually with the 'clear security flow session' command, which will either lead to forwarding to stop (and the system needs to be manually recovered with a reboot) or to a flowd core and automatic reboot. This issue affects Junos OS on SRX Series: * 24.2 versions before 24.2R2-S3, * 24.4 versions before 24.4R2-S1, 24.4R2-S2, * 25.2 versions before 25.2R1-S2, 25.2R2. This issue does not affect releases earlier than 24.2R1;

• CWE-362

• https://supportportal.juniper.net/JSA110090Vendor Advisory

Published

Jul 9, 2026

Last Modified

Jul 13, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-57024A Use of Multiple Resources with Duplicate Identifier vulner…6.9
• CVE-2026-57025A Return of Pointer Value Outside of Expected Range vulnerab…6.8
• CVE-2026-57026An Improper Validation of Syntactic Correctness of Input vul…8.7
• CVE-2026-57027A Missing Release of Memory after Effective Lifetime vulnera…7.1
• CVE-2026-57028An Improper Restriction of Communication Channel to Intended…7.3
• CVE-2026-57029A Missing Synchronization vulnerability in the flow collecto…6
• CVE-2026-57031An Improper Check for Unusual or Exceptional Conditions vuln…5.3
• CVE-2026-57032An Improper Handling of Undefined Parameters vulnerability i…7.1
• CVE-2026-5704A flaw was found in tar. A remote attacker could exploit thi…5.5
• CVE-2026-5705A vulnerability was identified in code-projects Online Hotel…4.3
• CVE-2026-57053GNU libidn before 1.44 is prone to out-of-bounds reads of un…2.5
• CVE-2026-57054A Use of Incorrectly-Resolved Name or Reference vulnerabilit…6.9