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firefox: Compartment mismatch when parsing JavaScript JSON module

cve CVE-2025-0240 2 sources, 2 claims · Watch

Red Hat writes:
firefox: Compartment mismatch when parsing JavaScript JSON module the claim

What it is to other things

affectsmozilla/firefox
NVD
affectsmozilla/thunderbird
NVD
made_bymozilla
NVD

What each source says

PropertySourceSaidMeans here
Cvss
cvss
conflict		NVD4
receipt
Source
NVD
Its words
4.0
Read by
field:cve.metrics.cvssMetricV31[].cvssData.baseScore
Said since
2026-10-02 12:00 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "Firefox",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "128.*",
                "status": "unaffected",
                "version": "128.6",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "134",
                "versionType": "rpm"
              }
            ]
          },
          {
            "product": "Thunderbird",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "128.*",
                "status": "unaffected",
                "version": "128.6",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "134",
                "versionType": "rpm"
              }
            ]
          }
        ],
        "source": "security@mozilla.org"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*",
                "matchCriteriaId": "AEBB7F43-496D-4A67-8E9E-EEE29913B6DE",
                "versionEndExcluding": "128.6.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "4FDCA935-A68D-404E-A749-CA3845C709F0",
                "versionEndExcluding": "134.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "C92D62DE-A681-4B9D-9640-D12D04392A1B",
                "versionEndExcluding": "128.6.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "A633E231-80F8-4A92-BA69-B9BE5BE45D00",
                "versionEndExcluding": "134.0",
                "versionStartIncluding": "129.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6."
      },
      {
        "lang": "es",
        "value": "Analizar un módulo de JavaScript como JSON podría, en algunas circunstancias, provocar un acceso entre compartimentos, lo que puede dar lugar a use-after-free. Esta vulnerabilidad afecta a Firefox < 134 y Firefox ESR < 128.6."
      }
    ],
    "id": "CVE-2025-0240",
    "lastModified": "2026-09-30T19:10:01.007",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 4.0,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.5,
          "impactScore": 1.4,
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2025-0240",
            "options": [
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              },
              {
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              },
              {
                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2025-01-08T16:36:55.988099Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2025-01-07T16:15:38.663",
    "references": [
      {
        "source": "security@mozilla.org",
        "tags": [
          "Issue Tracking",
          "Permissions Required"
        ],
        "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1929623"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2025-01/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2025-02/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2025-04/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2025-05/"
      },
      {
        "source": "af854a3a-2127-422b-91ae-364da2661108",
        "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html"
      }
    ],
    "sourceIdentifier": "security@mozilla.org",
    "vulnStatus": "Modified",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-416"
          }
        ],
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  }
}
—
Cvss
cvss
conflict		Red Hat6.5
receipt
Source
Red Hat
Its words
6.5
Read by
field:cvss3_score
Said since
2026-09-29 09:44 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
What the source handed over
{
  "CVE": "CVE-2025-0240",
  "CWE": "CWE-416",
  "advisories": [
    "RHSA-2025:0138",
    "RHSA-2025:0137",
    "RHSA-2025:0134",
    "RHSA-2025:0167",
    "RHSA-2025:0144",
    "RHSA-2025:0133",
    "RHSA-2025:0287",
    "RHSA-2025:0166",
    "RHSA-2025:0136",
    "RHSA-2025:0147",
    "RHSA-2025:0135",
    "RHSA-2025:0284",
    "RHSA-2025:0162",
    "RHSA-2025:0132",
    "RHSA-2025:0286",
    "RHSA-2025:0275",
    "RHSA-2025:0165",
    "RHSA-2025:0281",
    "RHSA-2025:0080"
  ],
  "affected_packages": [
    "firefox-0:128.6.0-1.el9_0",
    "firefox-0:128.6.0-1.el8_4",
    "firefox-0:128.6.0-1.el9_4",
    "firefox-0:128.6.0-1.el8_2",
    "firefox-0:128.6.0-1.el8_10",
    "firefox-0:128.6.0-1.el9_2",
    "firefox-0:128.6.0-1.el7_9",
    "thunderbird-0:128.6.0-3.el8_10",
    "thunderbird-0:128.6.0-3.el8_4",
    "firefox-0:128.6.0-1.el8_8",
    "thunderbird-0:128.6.0-3.el9_4",
    "firefox-0:128.6.0-1.el8_6",
    "thunderbird-0:128.6.0-3.el8_6",
    "firefox-0:128.6.0-1.el9_5",
    "thunderbird-0:128.6.0-3.el9_5",
    "thunderbird-0:128.6.0-3.el9_0",
    "thunderbird-0:128.6.0-3.el8_2",
    "thunderbird-0:128.6.0-3.el9_2",
    "thunderbird-0:128.6.0-3.el8_8"
  ],
  "bugzilla": "2336188",
  "bugzilla_description": "firefox: Compartment mismatch when parsing JavaScript JSON module",
  "cvss3_score": "6.5",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2025-01-07T16:07:06Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-0240.json",
  "severity": "moderate"
}
—
Cwe
cwe
Red HatCWE-416
receipt
Source
Red Hat
Its words
CWE-416
Read by
field:CWE
Said since
2026-09-29 09:44 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
What the source handed over
{
  "CVE": "CVE-2025-0240",
  "CWE": "CWE-416",
  "advisories": [
    "RHSA-2025:0138",
    "RHSA-2025:0137",
    "RHSA-2025:0134",
    "RHSA-2025:0167",
    "RHSA-2025:0144",
    "RHSA-2025:0133",
    "RHSA-2025:0287",
    "RHSA-2025:0166",
    "RHSA-2025:0136",
    "RHSA-2025:0147",
    "RHSA-2025:0135",
    "RHSA-2025:0284",
    "RHSA-2025:0162",
    "RHSA-2025:0132",
    "RHSA-2025:0286",
    "RHSA-2025:0275",
    "RHSA-2025:0165",
    "RHSA-2025:0281",
    "RHSA-2025:0080"
  ],
  "affected_packages": [
    "firefox-0:128.6.0-1.el9_0",
    "firefox-0:128.6.0-1.el8_4",
    "firefox-0:128.6.0-1.el9_4",
    "firefox-0:128.6.0-1.el8_2",
    "firefox-0:128.6.0-1.el8_10",
    "firefox-0:128.6.0-1.el9_2",
    "firefox-0:128.6.0-1.el7_9",
    "thunderbird-0:128.6.0-3.el8_10",
    "thunderbird-0:128.6.0-3.el8_4",
    "firefox-0:128.6.0-1.el8_8",
    "thunderbird-0:128.6.0-3.el9_4",
    "firefox-0:128.6.0-1.el8_6",
    "thunderbird-0:128.6.0-3.el8_6",
    "firefox-0:128.6.0-1.el9_5",
    "thunderbird-0:128.6.0-3.el9_5",
    "thunderbird-0:128.6.0-3.el9_0",
    "thunderbird-0:128.6.0-3.el8_2",
    "thunderbird-0:128.6.0-3.el9_2",
    "thunderbird-0:128.6.0-3.el8_8"
  ],
  "bugzilla": "2336188",
  "bugzilla_description": "firefox: Compartment mismatch when parsing JavaScript JSON module",
  "cvss3_score": "6.5",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2025-01-07T16:07:06Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-0240.json",
  "severity": "moderate"
}
—
Packages
packages
Red Hatfirefox-0:128.6.0-1.el9_0, firefox-0:128.6.0-1.el8_4, firefox-0:128.6.0-1.el9_4, firefox-0:128.6.0-1.el8_2, firefox-0:128.6.0-1.el8_10, firefox-0:128.6.0-1.el9_2, firefox-0:128.6.0-1.el7_9, thunderbird-0:128.6.0-3.el8_10, thunderbird-0:128.6.0-3.el8_4, firefox-0:128.6.0-1.el8_8, thunderbird-0:128.6.0-3.el9_4, firefox-0:128.6.0-1.el8_6, thunderbird-0:128.6.0-3.el8_6, firefox-0:128.6.0-1.el9_5, thunderbird-0:128.6.0-3.el9_5, thunderbird-0:128.6.0-3.el9_0, thunderbird-0:128.6.0-3.el8_2, thunderbird-0:128.6.0-3.el9_2, thunderbird-0:128.6.0-3.el8_8
receipt
Source
Red Hat
Its words
firefox-0:128.6.0-1.el9_0, firefox-0:128.6.0-1.el8_4, firefox-0:128.6.0-1.el9_4, firefox-0:128.6.0-1.el8_2, firefox-0:128.6.0-1.el8_10, firefox-0:128.6.0-1.el9_2, firefox-0:128.6.0-1.el7_9, thunderbird-0:128.6.0-3.el8_10, thunderbird-0:128.6.0-3.el8_4, firefox-0:128.6.0-1.el8_8, thunderbird-0:128.6.0-3.el9_4, firefox-0:128.6.0-1.el8_6, thunderbird-0:128.6.0-3.el8_6, firefox-0:128.6.0-1.el9_5, thunderbird-0:128.6.0-3.el9_5, thunderbird-0:128.6.0-3.el9_0, thunderbird-0:128.6.0-3.el8_2, thunderbird-0:128.6.0-3.el9_2, thunderbird-0:128.6.0-3.el8_8
Read by
field:affected_packages[]
Said since
2026-09-29 09:44 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
What the source handed over
{
  "CVE": "CVE-2025-0240",
  "CWE": "CWE-416",
  "advisories": [
    "RHSA-2025:0138",
    "RHSA-2025:0137",
    "RHSA-2025:0134",
    "RHSA-2025:0167",
    "RHSA-2025:0144",
    "RHSA-2025:0133",
    "RHSA-2025:0287",
    "RHSA-2025:0166",
    "RHSA-2025:0136",
    "RHSA-2025:0147",
    "RHSA-2025:0135",
    "RHSA-2025:0284",
    "RHSA-2025:0162",
    "RHSA-2025:0132",
    "RHSA-2025:0286",
    "RHSA-2025:0275",
    "RHSA-2025:0165",
    "RHSA-2025:0281",
    "RHSA-2025:0080"
  ],
  "affected_packages": [
    "firefox-0:128.6.0-1.el9_0",
    "firefox-0:128.6.0-1.el8_4",
    "firefox-0:128.6.0-1.el9_4",
    "firefox-0:128.6.0-1.el8_2",
    "firefox-0:128.6.0-1.el8_10",
    "firefox-0:128.6.0-1.el9_2",
    "firefox-0:128.6.0-1.el7_9",
    "thunderbird-0:128.6.0-3.el8_10",
    "thunderbird-0:128.6.0-3.el8_4",
    "firefox-0:128.6.0-1.el8_8",
    "thunderbird-0:128.6.0-3.el9_4",
    "firefox-0:128.6.0-1.el8_6",
    "thunderbird-0:128.6.0-3.el8_6",
    "firefox-0:128.6.0-1.el9_5",
    "thunderbird-0:128.6.0-3.el9_5",
    "thunderbird-0:128.6.0-3.el9_0",
    "thunderbird-0:128.6.0-3.el8_2",
    "thunderbird-0:128.6.0-3.el9_2",
    "thunderbird-0:128.6.0-3.el8_8"
  ],
  "bugzilla": "2336188",
  "bugzilla_description": "firefox: Compartment mismatch when parsing JavaScript JSON module",
  "cvss3_score": "6.5",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2025-01-07T16:07:06Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-0240.json",
  "severity": "moderate"
}
—
Product
product
NVDFirefox
receipt
Source
NVD
Its words
Firefox
Read by
field:cve.affected[].affectedData[].product
Said since
2026-10-02 12:00 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "Firefox",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "128.*",
                "status": "unaffected",
                "version": "128.6",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "134",
                "versionType": "rpm"
              }
            ]
          },
          {
            "product": "Thunderbird",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "128.*",
                "status": "unaffected",
                "version": "128.6",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "134",
                "versionType": "rpm"
              }
            ]
          }
        ],
        "source": "security@mozilla.org"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*",
                "matchCriteriaId": "AEBB7F43-496D-4A67-8E9E-EEE29913B6DE",
                "versionEndExcluding": "128.6.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "4FDCA935-A68D-404E-A749-CA3845C709F0",
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                "vulnerable": true
              },
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                "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "C92D62DE-A681-4B9D-9640-D12D04392A1B",
                "versionEndExcluding": "128.6.0",
                "vulnerable": true
              },
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                "versionEndExcluding": "134.0",
                "versionStartIncluding": "129.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6."
      },
      {
        "lang": "es",
        "value": "Analizar un módulo de JavaScript como JSON podría, en algunas circunstancias, provocar un acceso entre compartimentos, lo que puede dar lugar a use-after-free. Esta vulnerabilidad afecta a Firefox < 134 y Firefox ESR < 128.6."
      }
    ],
    "id": "CVE-2025-0240",
    "lastModified": "2026-09-30T19:10:01.007",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 4.0,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.5,
          "impactScore": 1.4,
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2025-0240",
            "options": [
              {
                "exploitation": "none"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2025-01-08T16:36:55.988099Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2025-01-07T16:15:38.663",
    "references": [
      {
        "source": "security@mozilla.org",
        "tags": [
          "Issue Tracking",
          "Permissions Required"
        ],
        "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1929623"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2025-01/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2025-02/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2025-04/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
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}
—
Severity
severity
Red Hatmoderate
A flaw that is harder to exploit, or whose impact is limited.
receipt
Source
Red Hat
Its words
moderate
Read by
field:severity
Said since
2026-09-29 09:44 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
What the source handed over
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  "advisories": [
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    "RHSA-2025:0137",
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    "thunderbird-0:128.6.0-3.el8_6",
    "firefox-0:128.6.0-1.el9_5",
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  "cvss3_score": "6.5",
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}
medium
Status
status
NVDModified
receipt
Source
NVD
Its words
Modified
Read by
field:cve.vulnStatus
Said since
2026-10-02 12:00 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
What the source handed over
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}
—
Vendor
vendor
NVDMozilla
receipt
Source
NVD
Its words
Mozilla
Read by
field:cve.affected[].affectedData[].vendor
Said since
2026-10-02 12:00 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
What the source handed over
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  }
}
—

vulnerability

firefox: Compartment mismatch when parsing JavaScript JSON module
zetlyn/cve-redhat · 2025-01-07
cvss 6.5 cwe CWE-416 packages firefox-0:128.6.0-1.el9_0, firefox-0:128.6.0-1.el8_4, firefox-0:128.6.0-1.el9_4, firefox-0:128.6.0-1.el8_2, firefox-0:128.6.0-1.el8_10, firefox-0:128.6.0-1.el9_2, firefox-0:128.6.0-1.el7_9, thunderbird-0:128.6.0-3.el8_10, thunderbird-0:128.6.0-3.el8_4, firefox-0:128.6.0-1.el8_8, thunderbird-0:128.6.0-3.el9_4, firefox-0:128.6.0-1.el8_6, thunderbird-0:128.6.0-3.el8_6, firefox-0:128.6.0-1.el9_5, thunderbird-0:128.6.0-3.el9_5, thunderbird-0:128.6.0-3.el9_0, thunderbird-0:128.6.0-3.el8_2, thunderbird-0:128.6.0-3.el9_2, thunderbird-0:128.6.0-3.el8_8 severity moderate source
Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
zetlyn/cve-nvd · 2025-01-07
cvss 4 product Firefox status Modified vendor Mozilla source