CVE-2022-22247: Junos OS Evolved: Kernel processing of unvalidated TCP segments could lead to a Denial of Service (DoS)

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-10-18 · updated 2026-06-17
Weakness: CWE-20

Description

An Improper Input Validation vulnerability in ingress TCP segment processing of Juniper Networks Junos OS Evolved allows a network-based unauthenticated attacker to send a crafted TCP segment to the device, triggering a kernel panic, leading to a Denial of Service (DoS) condition. Continued receipt and processing of this TCP segment could create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS Evolved: 21.3 versions prior to 21.3R3-EVO; 21.4 versions prior to 21.4R2-EVO; 22.1 versions prior to 22.1R2-EVO. This issue does not affect Juniper Networks Junos OS Evolved versions prior to 21.3R1-EVO.

Affected products

Juniper Networks Junos OS Evolved: 21.3, 21.3-r1, 21.3-r1-s1, 21.3-r2, 21.4, 21.4-r1 (+2)

References

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