CVE-2026-23378

A flaw was found in the Linux kernel, specifically within the networking scheduler's Ingress Forwarding Engine IFE action. When an IFE action attempts to replace metadata, it incorrectly appends new metadata instead of replacing the old. This unbounded addition of metadata can lead to an...

CVE-2026-21906

An Improper Handling of Exceptional Conditions vulnerability in the packet forwarding engine PFE of Juniper Networks Junos OS on SRX Series allows an unauthenticated network-based attacker sending a specific ICMP packet through a GRE tunnel to cause the PFE to crash and restart. When PowerMode...

CVE-2026-21903

A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine pfe of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service DoS. Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting...

CVE-2026-21903

A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine pfe of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service DoS. Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting...

CVE-2026-21906 Junos OS: SRX Series: With GRE performance acceleration enabled, receipt of a specific ICMP packet causes the PFE to crash

An Improper Handling of Exceptional Conditions vulnerability in the packet forwarding engine PFE of Juniper Networks Junos OS on SRX Series allows an unauthenticated network-based attacker sending a specific ICMP packet through a GRE tunnel to cause the PFE to crash and restart. When PowerMode...

CVE-2026-21903

A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine pfe of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service DoS. Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting...

EUVD-2026-2692

A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine pfe of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service DoS. Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting...

CVE-2026-21903

CVE-2026-21903 is a stack-based buffer overflow in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS. A network-based attacker with low privileges can trigger a Denial-of-Service by subscribing to telemetry sensors at scale, which causes all FPC connections to drop, an FPC crash, an...

CVE-2026-21903 Junos OS: Subscribing to telemetry sensors at scale causes all FPCs to crash

A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine pfe of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service DoS. Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting...

Juniper Networks Junos OS security vulnerabilities

Juniper Networks Junos OS is a network operating system specifically designed for hardware devices used by Juniper Networks. This operating system provides secure programming interfaces and the Junos SDK. Vulnerabilities exist in versions of Junos OS prior to 22.4R3-S7, 23.2R2-S4, and 23.4R2. The...

Juniper Networks Junos OS security vulnerabilities

Juniper Networks Junos OS is a network operating system specifically designed for hardware devices used by Juniper Networks. This operating system provides secure programming interfaces and the Junos SDK. Vulnerabilities exist in versions of Juniper Networks Junos OS prior to 21.4R3-S12, 22.4R3-S...

Juniper Networks Junos OS code-related vulnerabilities

Juniper Networks Junos OS is a network operating system specifically designed for hardware devices used by Juniper Networks. This operating system provides secure programming interfaces and the Junos SDK. Code vulnerabilities existed in versions prior to Junos OS 21.4R3-S12, all versions of Junos...

CVE-2026-21910: Improper Check for Unusual or Exceptional Conditions

An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine PFE of Juniper Networks Junos OS on EX4k Series and QFX5k Series platforms allows an unauthenticated network-adjacent attacker flapping an interface to cause traffic between VXLAN Network...

PT-2026-3118

Name of the Vulnerable Software and Affected Versions Juniper Networks Junos OS versions prior to 22.4R3-S7 Juniper Networks Junos OS versions prior to 23.2R2-S4 Juniper Networks Junos OS versions prior to 23.4R2 Description A Stack-based Buffer Overflow exists in the Packet Forwarding Engine pfe...

CVE-2026-21903: Stack-based Buffer Overflow

A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine pfe of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service DoS. Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting...

Packet Forwarding Engine DoS

The vulnerability of the Packet Forwarding Engine PFE module in the JunOS operating system is related to the use of an uninitialized resource. Exploiting this vulnerability could allow a malicious actor to cause service interruptions...

Juniper Junos OS Vulnerability (JSA103153)

The version of Junos OS installed on the remote host is affected by a vulnerability as referenced in the JSA103153 advisory. - A Use of Uninitialized Resource vulnerability in the Packet Forwarding Engine PFE of Juniper Networks Junos OS on SRX4700 devices allows an unauthenticated, network-based...

CVE-2025-59964

A Use of Uninitialized Resource vulnerability in the Packet Forwarding Engine PFE of Juniper Networks Junos OS on SRX4700 devices allows an unauthenticated, network-based attacker to cause a Denial of Service DoS. When forwarding-options sampling is enabled, receipt of any traffic destined to the...

EUVD-2025-33397

A Use of Uninitialized Resource vulnerability in the Packet Forwarding Engine PFE of Juniper Networks Junos OS on SRX4700 devices allows an unauthenticated, network-based attacker to cause a Denial of Service DoS. When forwarding-options sampling is enabled, receipt of any traffic destined to the...

CVE-2025-59964

A Use of Uninitialized Resource vulnerability in the Packet Forwarding Engine PFE of Juniper Networks Junos OS on SRX4700 devices allows an unauthenticated, network-based attacker to cause a Denial of Service DoS. When forwarding-options sampling is enabled, receipt of any traffic destined to the...