6.5

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 in an FPC crash and restart.
The issue was not seen when YANG packages for the specific sensors were installed. 



This issue affects Junos OS: 



  *  all versions before 22.4R3-S7,
  *  23.2 version before 23.2R2-S4,
  *  23.4 versions before 23.4R2.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Juniper ≫ Junos Version < 22.4
Juniper ≫ Junos Version 22.4 Update -
Juniper ≫ Junos Version 22.4 Update r1
Juniper ≫ Junos Version 22.4 Update r1-s1
Juniper ≫ Junos Version 22.4 Update r1-s2
Juniper ≫ Junos Version 22.4 Update r2
Juniper ≫ Junos Version 22.4 Update r2-s1
Juniper ≫ Junos Version 22.4 Update r2-s2
Juniper ≫ Junos Version 22.4 Update r3
Juniper ≫ Junos Version 22.4 Update r3-s1
Juniper ≫ Junos Version 22.4 Update r3-s2
Juniper ≫ Junos Version 22.4 Update r3-s3
Juniper ≫ Junos Version 22.4 Update r3-s4
Juniper ≫ Junos Version 22.4 Update r3-s5
Juniper ≫ Junos Version 22.4 Update r3-s6
Juniper ≫ Junos Version 23.2 Update -
Juniper ≫ Junos Version 23.2 Update r1
Juniper ≫ Junos Version 23.2 Update r1-s1
Juniper ≫ Junos Version 23.2 Update r1-s2
Juniper ≫ Junos Version 23.2 Update r2
Juniper ≫ Junos Version 23.2 Update r2-s1
Juniper ≫ Junos Version 23.2 Update r2-s2
Juniper ≫ Junos Version 23.2 Update r2-s3
Juniper ≫ Junos Version 23.4 Update -
Juniper ≫ Junos Version 23.4 Update r1
Juniper ≫ Junos Version 23.4 Update r1-s1
Juniper ≫ Junos Version 23.4 Update r1-s2
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.37% 0.304
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Juniper 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Juniper 7.1 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-121 Stack-based Buffer Overflow

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

https://supportportal.juniper.net/JSA106022
Vendor Advisory
https://kb.juniper.net/JSA106022
Vendor Advisory