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Critical · 9.8 CVE-2026-101980 EUVD-2026-101439GHSA-3gp7-cmr3-7prg

Junos OS: Malformed Extended Echo requests cause a Routing Engine reboot when Extended Echo is enabled

Published Oct 14, 2026 · Updated Oct 14, 2026 · Assigned by juniper

Description

An Integer Underflow vulnerability in the kernel of Juniper Networks Junos OS with Extended Echo configured allows an unauthenticated, network-based attacker to cause a denial of service by a kernel crash.

Affected products

VendorProductAffectedFixed
Juniper Networks Junos OS < 23.2R2-S7.7, 23.4 – < 23.4R2-S8.13, 24.2 – < 24.2R2-S5.5, 24.4 – < 24.4R2-S5, 25.2 – < 25.2R2-S2, 25.4 – < 25.4R1-S3, 26.2 – < 26.2R1-S2 23.2R2-S7.7

Advisories 1

References