Product Affected: This issue affects all versions of Junos OS on SRX Series. Severity: High Severity Assessment (CVSS) Score: - CVSS v3.1: 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) - CVSS v4.0: 8.7 (AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M) Problem: An improper locking vulnerability in the GTP plugin allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). The issue arises when a malformed GPRS Tunneling Protocol (GTP) Modify Bearer Request message leads to a watchdog timeout causing an FPC crash. Solution: The following software releases have been updated to resolve this issue: 22.4R3-S8, 23.2R2-S5, 23.4R2-S6, 24.2R2-S3, 24.4R2-S2, 25.2R1-S1, 25.2R2, 25.4R1, and all subsequent releases. The issue is being tracked as 1882028. Workaround: There are no known workarounds for this issue.