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CVE-2026-21918 Junos OS: SRX and MX Series: When TCP packets occur in a specific sequence flowd crashes

🗓️ 15 Jan 2026 20:27:54Reported by juniperType 
cvelist
 cvelist
🔗 www.cve.org👁 29 Views

Flowd double free in Junos OS on SRX and MX causes flowd crash and Denial of Service during TCP session setup.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-21918
15 Jan 202620:27
attackerkb
Circl
CVE-2026-21918
15 Jan 202621:54
circl
CNNVD
Juniper Networks Junos OS resource management error vulnerability
15 Jan 202600:00
cnnvd
CVE
CVE-2026-21918
15 Jan 202620:27
cve
EUVD
EUVD-2026-2697
15 Jan 202620:27
euvd
Tenable Nessus
Juniper Junos OS Vulnerability (JSA106018)
14 Jan 202600:00
nessus
NCSC
Vulnerabilities fixed in Juniper Networks JunOS
16 Jan 202610:07
ncsc
NVD
CVE-2026-21918
15 Jan 202621:16
nvd
Positive Technologies
PT-2026-3130
15 Jan 202600:00
ptsecurity
RedhatCVE
CVE-2026-21918
16 Jan 202621:33
redhatcve
Rows per page
[
  {
    "defaultStatus": "unaffected",
    "platforms": [
      "SRX Series",
      "MX Series"
    ],
    "product": "Junos OS",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "22.4R3-S7",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "lessThan": "23.2R2-S3",
        "status": "affected",
        "version": "23.2",
        "versionType": "semver"
      },
      {
        "lessThan": "23.4R2-S4",
        "status": "affected",
        "version": "23.4",
        "versionType": "semver"
      },
      {
        "lessThan": "24.2R2",
        "status": "affected",
        "version": "24.2",
        "versionType": "semver"
      }
    ]
  }
]

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