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CVE-2026-0203 Junos OS: Receipt of a specifically malformed ICMP packet causes an FPC restart

🗓️ 15 Jan 2026 20:17:24Reported by juniperType 
cvelist
 cvelist
🔗 www.cve.org👁 22 Views

Unauthenticated attacker sends malformed internet control protocol version four packet to crash the FPC and cause DoS in Junos OS; ICMPv6 not affected.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-0203
15 Jan 202620:17
attackerkb
CNNVD
Juniper Networks Junos OS security vulnerabilities
15 Jan 202600:00
cnnvd
CVE
CVE-2026-0203
15 Jan 202620:17
cve
EUVD
EUVD-2026-2681
15 Jan 202620:17
euvd
NCSC
Vulnerabilities fixed in Juniper Networks JunOS
16 Jan 202610:07
ncsc
NVD
CVE-2026-0203
15 Jan 202621:16
nvd
Positive Technologies
PT-2026-3107
15 Jan 202600:00
ptsecurity
RedhatCVE
CVE-2026-0203
16 Jan 202620:18
redhatcve
Vulnrichment
CVE-2026-0203 Junos OS: Receipt of a specifically malformed ICMP packet causes an FPC restart
15 Jan 202620:17
vulnrichment
[
  {
    "defaultStatus": "unaffected",
    "product": "Junos OS",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "21.2R3-S9",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "lessThan": "21.4R3-S10",
        "status": "affected",
        "version": "21.4",
        "versionType": "semver"
      },
      {
        "lessThan": "22.2R3-S7",
        "status": "affected",
        "version": "22.2",
        "versionType": "semver"
      },
      {
        "lessThan": "22.3R3-S4",
        "status": "affected",
        "version": "22.3",
        "versionType": "semver"
      },
      {
        "lessThan": "22.4R3-S5",
        "status": "affected",
        "version": "22.4",
        "versionType": "semver"
      },
      {
        "lessThan": "23.2R2-S3",
        "status": "affected",
        "version": "23.2",
        "versionType": "semver"
      },
      {
        "lessThan": "23.4R2-S3",
        "status": "affected",
        "version": "23.4",
        "versionType": "semver"
      },
      {
        "lessThan": "24.2R1-S2, 24.2R2",
        "status": "affected",
        "version": "24.2",
        "versionType": "semver"
      }
    ]
  }
]

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