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CVE-2026-101985

Junos OS Evolved: PTX Series: An IS-IS peer causes an rpd crash when BIER over IS-IS is enabled

Juniper Networks Junos OS EvolvedNetwork & edge
Open in ThreatlineRecord JSON
CVSS
6.5Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.27%Chance of exploitation activity in the next 30 days, higher than 18% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in23.4R2-S8.11-EVOAlso 24.2R2-S5.6-EVO, 24.4R2-S5-EVO and 5 moreCVE List
Published14 Oct 2026Updated 14 Oct 2026CVE List

What fixes it

Show all 8 fixed versions
  • 25.2X100-D35-EVOJunos OS EvolvedCVE List
  • 25.4X300-D40-EVOJunos OS EvolvedCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

A Improper Validation of Specified Quantity in Input vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated IS-IS peer to cause a denial of service.

Text from CVE List

Affected versions 9

  • Junos OS Evolvedaffected: 23.4 before 23.4R2-S8.11-EVOCVE List
  • Junos OS Evolvedaffected: 24.2 before 24.2R2-S5.6-EVOCVE List
  • Junos OS Evolvedaffected: 24.4 before 24.4R2-S5-EVOCVE List
  • Junos OS Evolvedaffected: 25.2 before 25.2R2-S2-EVOCVE List
  • Junos OS Evolvedaffected: 25.4 before 25.4R1-S3-EVOCVE List
  • Junos OS Evolvedaffected: 26.2 before 26.2R1-S2-EVOCVE List
  • Junos OS Evolvedaffected: 23.4X100CVE List
  • Junos OS Evolvedaffected: 25.2X100 before 25.2X100-D35-EVOCVE List
  • Junos OS Evolvedaffected: 25.4X300 before 25.4X300-D40-EVOCVE List

References 1