Vulnerability-Lookup

GHSA-Q958-7F7X-PMQ4

Vulnerability from github – Published: 2026-07-10 00:31 – Updated: 2026-07-10 00:31

Details

On EX Series, QFX Series and MX Series a low-privileged attacker issuing a specific 'show l2-learning' command will cause an l2ald crash which will lead to a temporary service impact for all layer 2 services until the process has automatically restarted.

This issue affects EX Series, QFX Series, MX Series: Junos OS:

all versions before 23.2R2-S7,
23.4 versions before 23.4R2-S7,
24.2 versions before 24.2R2,
24.4 versions before 24.4R1-S2.

Junos OS Evolved: * all versions before 23.2R2-S7-EVO, * 23.4 versions before 23.4R2-S8-EVO, * 24.2 versions before 24.2R2-EVO, * 24.4 versions before 24.4R1-S3-EVO.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

6.8 (Medium)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-57025"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-466"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-09T22:17:07Z",
    "severity": "MODERATE"
  },
  "details": "A Return of Pointer Value Outside of Expected Range vulnerability in the fileio library of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privilged attacker to cause a Denial-of-Service (DoS).\n\nOn EX Series, QFX Series and MX Series a\u00a0low-privileged attacker issuing a specific \u0027show l2-learning\u0027 command will cause an l2ald crash which will lead to a temporary service impact for all layer 2 services until the process has automatically restarted.\n\nThis issue affects EX Series, QFX Series, MX Series:\nJunos OS:\n\n\n  *  all versions before 23.2R2-S7,\n  *  23.4 versions before 23.4R2-S7,\n  *  24.2 versions before 24.2R2,\n  *  24.4 versions before 24.4R1-S2.\n\n\n\nJunos OS Evolved:\n  *  all versions before 23.2R2-S7-EVO,\n  *  23.4 versions before 23.4R2-S8-EVO,\n  *  24.2 versions before 24.2R2-EVO,\n  *  24.4 versions before 24.4R1-S3-EVO.",
  "id": "GHSA-q958-7f7x-pmq4",
  "modified": "2026-07-10T00:31:26Z",
  "published": "2026-07-10T00:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-57025"
    },
    {
      "type": "WEB",
      "url": "https://supportportal.juniper.net/JSA110085"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/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:Y/R:A/V:X/RE:M/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-57025 (GCVE-0-2026-57025)

Vulnerability from cvelistv5 – Published: 2026-07-09 21:07 – Updated: 2026-07-09 21:07

Title

Junos OS and Junos OS Evolved: EX Series, QFX Series, MX Series: A specific 'show l2-learning' command causes l2ald crash

Summary

A Return of Pointer Value Outside of Expected Range vulnerability in the fileio library of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privilged attacker to cause a Denial-of-Service (DoS). On EX Series, QFX Series and MX Series a low-privileged attacker issuing a specific 'show l2-learning' command will cause an l2ald crash which will lead to a temporary service impact for all layer 2 services until the process has automatically restarted. This issue affects EX Series, QFX Series, MX Series: Junos OS: * all versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S7, * 24.2 versions before 24.2R2, * 24.4 versions before 24.4R1-S2. Junos OS Evolved: * all versions before 23.2R2-S7-EVO, * 23.4 versions before 23.4R2-S8-EVO, * 24.2 versions before 24.2R2-EVO, * 24.4 versions before 24.4R1-S3-EVO.

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

6.8 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M

CWE

CWE-466 - Return of Pointer Value Outside of Expected Range

Assigner

juniper

References

1 reference

URL	Tags
https://supportportal.juniper.net/JSA110085	vendor-advisory

Impacted products

2 products

Vendor	Product	Version
Juniper Networks	Junos OS	Affected: 0 , < 23.2R2-S7 (custom) Affected: 23.4 , < 23.4R2-S7 (custom) Affected: 24.2 , < 24.2R2 (custom) Affected: 24.4 , < 24.4R1-S2 (custom)
Juniper Networks	Junos OS Evolved	Affected: 0 , < 23.2R2-S7-EVO (custom) Affected: 23.4 , < 23.4R2-S8-EVO (custom) Affected: 24.2 , < 24.2R2-EVO (custom) Affected: 24.4 , < 24.4R1-S3-EVO (custom)

Date Public

2026-07-08 16:00

Show details on NVD website

JSON

To clipboard

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      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "EX Series",
            "QFX Series",
            "MX Series"
          ],
          "product": "Junos OS",
          "vendor": "Juniper Networks",
          "versions": [
            {
              "lessThan": "23.2R2-S7",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "lessThan": "23.4R2-S7",
              "status": "affected",
              "version": "23.4",
              "versionType": "custom"
            },
            {
              "lessThan": "24.2R2",
              "status": "affected",
              "version": "24.2",
              "versionType": "custom"
            },
            {
              "lessThan": "24.4R1-S2",
              "status": "affected",
              "version": "24.4",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Junos OS Evolved",
          "vendor": "Juniper Networks",
          "versions": [
            {
              "lessThan": "23.2R2-S7-EVO",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "lessThan": "23.4R2-S8-EVO",
              "status": "affected",
              "version": "23.4",
              "versionType": "custom"
            },
            {
              "lessThan": "24.2R2-EVO",
              "status": "affected",
              "version": "24.2",
              "versionType": "custom"
            },
            {
              "lessThan": "24.4R1-S3-EVO",
              "status": "affected",
              "version": "24.4",
              "versionType": "custom"
            }
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        }
      ],
      "datePublic": "2026-07-08T16:00:00.000Z",
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        }
      ],
      "exploits": [
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            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
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            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
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            "vulnerabilityResponseEffort": "MODERATE"
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        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
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      "references": [
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          "tags": [
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-Q958-7F7X-PMQ4

CVE-2026-57025 (GCVE-0-2026-57025)

Tags

Sightings

Nomenclature