Skip to content
Heist/ feed
High

Junos OS and Junos OS Evolved: Malformed MC-LAG ICCP message causes l2ald heap disclosure or crash

Type: advisorySource: Official CVE List1 source record

An Improper Handling of Length Parameter Inconsistency vulnerability in the l2ald daemon of Juniper Networks Junos OS and Junos OS Evolved allows an attacker who can control or impersonate a configured MC-LAG ICCP peer to disclose process heap memory or cause a denial of service via a malformed ICCP message.

Announced Source revision 1
Original source ↗

CVE-2026-101994

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-101994

Junos OS

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Junos OS Evolved

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Juniper Networks",
    "product": "Junos OS",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "23.2R2-S7.7",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "23.4",
        "lessThan": "23.4R2-S8.13",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "24.2",
        "lessThan": "24.2R2-S5.5",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "24.4",
        "lessThan": "24.4R2-S5",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "25.2",
        "lessThan": "25.2R2-S2",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "25.4",
        "lessThan": "25.4R1-S3",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "26.2",
        "lessThan": "26.2R1-S2",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "Juniper Networks",
    "product": "Junos OS Evolved",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "23.2R2-S7.7-EVO",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "23.4",
        "lessThan": "23.4R2-S8.11-EVO",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "24.2",
        "lessThan": "24.2R2-S5.6-EVO",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "24.4",
        "lessThan": "24.4R2-S5-EVO",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "25.2",
        "lessThan": "25.2R2-S2-EVO",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "25.4",
        "lessThan": "25.4R1-S3-EVO",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "26.2",
        "lessThan": "26.2R1-S2-EVO",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "23.4X100",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "25.2X100",
        "lessThan": "25.2X100-D35-EVO",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "25.4X300",
        "lessThan": "25.4X300-D40-EVO",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-101994

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#32641 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement