{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-8027", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2025-07-22T10:13:47.266Z", "datePublished": "2025-07-22T20:49:24.039Z", "dateUpdated": "2026-04-13T14:26:46.624Z"}, "containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "115.26", "lessThanOrEqual": "115.*", "versionType": "rpm"}, {"status": "unaffected", "version": "128.13", "lessThanOrEqual": "128.*", "versionType": "rpm"}, {"status": "unaffected", "version": "140.1", "lessThanOrEqual": "140.*", "versionType": "rpm"}, {"status": "unaffected", "version": "141", "lessThanOrEqual": "*", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "128.13", "lessThanOrEqual": "128.*", "versionType": "rpm"}, {"status": "unaffected", "version": "140.1", "lessThanOrEqual": "140.*", "versionType": "rpm"}, {"status": "unaffected", "version": "141", "lessThanOrEqual": "*", "versionType": "rpm"}]}], "descriptions": [{"lang": "en", "value": "On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1."}]}], "title": "JavaScript engine only wrote partial return value to stack", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1968423"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-56/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-57/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-58/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-59/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-61/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-62/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-63/"}], "credits": [{"lang": "en", "value": "Nan Wang"}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-04-13T14:26:46.624Z"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-457", "lang": "en", "description": "CWE-457 Use of Uninitialized Variable"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2025-07-23T13:42:23.408460Z", "id": "CVE-2025-8027", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-07-23T13:46:28.122Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/07/msg00016.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:07:44.121Z"}}]}}

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{"created": "2025-07-23T17:35:59.003889+00:00", "updated": "2025-07-23T17:35:59.003959+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox", "mozilla$PRODUCT$firefox_esr", "mozilla$PRODUCT$thunderbird"]}