{"api_version":"1","generated_at":"2026-07-23T15:12:57+00:00","cve":"CVE-2025-3031","urls":{"html":"https://cve.report/CVE-2025-3031","api":"https://cve.report/api/cve/CVE-2025-3031.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-3031","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-3031"},"summary":{"title":"JIT optimization bug with different stack slot sizes","description":"An attacker could read 32 bits of values spilled onto the stack in a JIT compiled function. This vulnerability was fixed in Firefox 137 and Thunderbird 137.","state":"PUBLISHED","assigner":"mozilla","published_at":"2025-04-01 13:15:41","updated_at":"2026-04-13 15:16:56"},"problem_types":["CWE-200","CWE-200 CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","score":"6.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","score":"6.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"}}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1947141","name":"https://bugzilla.mozilla.org/show_bug.cgi?id=1947141","refsource":"security@mozilla.org","tags":["Issue Tracking","Permissions Required"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-20/","name":"https://www.mozilla.org/security/advisories/mfsa2025-20/","refsource":"security@mozilla.org","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-23/","name":"https://www.mozilla.org/security/advisories/mfsa2025-23/","refsource":"security@mozilla.org","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-3031","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-3031","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Mozilla","product":"Firefox","version":"unaffected 137 * rpm","platforms":[]},{"source":"CNA","vendor":"Mozilla","product":"Thunderbird","version":"unaffected 137 * rpm","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"anbu","lang":"en"}],"nvd_cpes":[{"cve_year":"2025","cve_id":"3031","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mozilla","cpe5":"firefox","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2025","cve_id":"3031","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mozilla","cpe5":"thunderbird","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2025","cve_id":"3031","cve":"CVE-2025-3031","epss":"0.002820000","percentile":"0.516070000","score_date":"2026-04-15","updated_at":"2026-04-16 00:13:56"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}},{"other":{"content":{"id":"CVE-2025-3031","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2025-04-01T18:37:35.719288Z","version":"2.0.3"},"type":"ssvc"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-200","description":"CWE-200 Exposure of Sensitive Information to an Unauthorized Actor","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2025-04-01T18:38:18.743Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"Firefox","vendor":"Mozilla","versions":[{"lessThanOrEqual":"*","status":"unaffected","version":"137","versionType":"rpm"}]},{"product":"Thunderbird","vendor":"Mozilla","versions":[{"lessThanOrEqual":"*","status":"unaffected","version":"137","versionType":"rpm"}]}],"credits":[{"lang":"en","value":"anbu"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"An attacker could read 32 bits of values spilled onto the stack in a JIT compiled function. This vulnerability was fixed in Firefox 137 and Thunderbird 137."}],"value":"An attacker could read 32 bits of values spilled onto the stack in a JIT compiled function. This vulnerability was fixed in Firefox 137 and Thunderbird 137."}],"providerMetadata":{"dateUpdated":"2026-04-13T14:29:28.718Z","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","shortName":"mozilla"},"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1947141"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-20/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-23/"}],"title":"JIT optimization bug with different stack slot sizes"}},"cveMetadata":{"assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","assignerShortName":"mozilla","cveId":"CVE-2025-3031","datePublished":"2025-04-01T12:29:02.220Z","dateReserved":"2025-03-31T09:35:24.758Z","dateUpdated":"2026-04-13T14:29:28.718Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-04-01 13:15:41","lastModifiedDate":"2026-04-13 15:16:56","problem_types":["CWE-200","CWE-200 CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":2.5}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*","versionEndExcluding":"137.0","matchCriteriaId":"1AD89C53-6274-4CA4-B450-444E8D6F82EB"},{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*","versionEndExcluding":"137.0","matchCriteriaId":"A16B6929-C99F-4E1A-994B-44543C0D5B5A"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"3031","Ordinal":"1","Title":"JIT optimization bug with different stack slot sizes","CVE":"CVE-2025-3031","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"3031","Ordinal":"1","NoteData":"An attacker could read 32 bits of values spilled onto the stack in a JIT compiled function. This vulnerability was fixed in Firefox 137 and Thunderbird 137.","Type":"Description","Title":"JIT optimization bug with different stack slot sizes"}]}}}