CVE-2025-5268

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{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "128.*", "status": "unaffected", "version": "128.11", "versionType": "rpm"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "139", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "128.*", "status": "unaffected", "version": "128.11", "versionType": "rpm"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "139", "versionType": "rpm"}]}], "source": "security@mozilla.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "matchCriteriaId": "4BA097AB-46D1-4C4E-9856-9109237940C3", "versionEndExcluding": "128.11.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "matchCriteriaId": "E2C0FE7C-6F8E-4F1D-A768-914194586E0C", "versionEndExcluding": "139.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "matchCriteriaId": "1495D4C0-92D7-4384-8730-B59560AD0BEE", "versionEndExcluding": "128.11.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "matchCriteriaId": "D3A0DDA7-A6CB-43C3-BF53-F21FFB089AD6", "versionEndExcluding": "139.0", "versionStartIncluding": "129.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11."}, {"lang": "es", "value": "Errores de seguridad de memoria presentes en Firefox 138, Thunderbird 138, Firefox ESR 128.10 y Thunderbird 128.10. Algunos de estos errores mostraron evidencia de corrupci\u00f3n de memoria y presumimos que, con suficiente esfuerzo, algunos de ellos podr\u00edan haberse explotado para ejecutar c\u00f3digo arbitrario. Esta vulnerabilidad afecta a Firefox menor que 139 y Firefox ESR menor que 128.11."}], "id": "CVE-2025-5268", "lastModified": "2026-10-05T15:10:00.590", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-5268", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-05-28T03:55:56.627233Z", "version": "2.0.3"}}]}, "published": "2025-05-27T13:15:22.610", "references": [{"source": "security@mozilla.org", "tags": ["Broken Link"], "url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1950136%2C1958121%2C1960499%2C1962634"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-42/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-44/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-45/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-46/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2025:8341", "cpe": "cpe:/o:redhat:enterprise_linux:10.0", "package": "firefox-0:128.11.0-1.el10_0", "product_name": "Red Hat Enterprise Linux 10", "release_date": "2025-06-02T00:00:00Z"}, {"advisory": "RHSA-2025:8608", "cpe": "cpe:/o:redhat:enterprise_linux:10.0", "package": "thunderbird-0:128.11.0-1.el10_0", "product_name": "Red Hat Enterprise Linux 10", "release_date": "2025-06-05T00:00:00Z"}, {"advisory": "RHSA-2025:9074", "cpe": "cpe:/o:redhat:rhel_els:7", "package": "firefox-0:128.11.0-1.el7_9", "product_name": "Red Hat Enterprise Linux 7 Extended Lifecycle Support", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8308", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "firefox-0:128.11.0-1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2025-05-29T00:00:00Z"}, {"advisory": "RHSA-2025:8756", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "thunderbird-0:128.11.0-1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2025-06-10T00:00:00Z"}, {"advisory": "RHSA-2025:8631", "cpe": "cpe:/a:redhat:rhel_aus:8.2", "package": "thunderbird-0:128.11.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9075", "cpe": "cpe:/a:redhat:rhel_aus:8.2", "package": "firefox-0:128.11.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8630", "cpe": "cpe:/a:redhat:rhel_aus:8.4", "package": "thunderbird-0:128.11.0-1.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9076", "cpe": "cpe:/a:redhat:rhel_aus:8.4", "package": "firefox-0:128.11.0-1.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8629", "cpe": "cpe:/a:redhat:rhel_aus:8.6", "package": "thunderbird-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9155", "cpe": "cpe:/a:redhat:rhel_aus:8.6", "package": "firefox-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2025-06-17T00:00:00Z"}, {"advisory": "RHSA-2025:8629", "cpe": "cpe:/a:redhat:rhel_tus:8.6", "package": "thunderbird-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9155", "cpe": "cpe:/a:redhat:rhel_tus:8.6", "package": "firefox-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2025-06-17T00:00:00Z"}, {"advisory": "RHSA-2025:8629", "cpe": "cpe:/a:redhat:rhel_e4s:8.6", "package": "thunderbird-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9155", "cpe": "cpe:/a:redhat:rhel_e4s:8.6", "package": "firefox-0:128.11.0-1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2025-06-17T00:00:00Z"}, {"advisory": "RHSA-2025:8628", "cpe": "cpe:/a:redhat:rhel_tus:8.8", "package": "thunderbird-0:128.11.0-1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:8628", "cpe": "cpe:/a:redhat:rhel_e4s:8.8", "package": "thunderbird-0:128.11.0-1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9077", "cpe": "cpe:/a:redhat:rhel_e4s:8.8", "package": "firefox-0:128.11.0-1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8293", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "firefox-0:128.11.0-1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-29T00:00:00Z"}, {"advisory": "RHSA-2025:8607", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "thunderbird-0:128.11.0-1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-06-05T00:00:00Z"}, {"advisory": "RHSA-2025:8598", "cpe": "cpe:/a:redhat:rhel_e4s:9.0", "package": "thunderbird-0:128.11.0-1.el9_0", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2025-06-05T00:00:00Z"}, {"advisory": "RHSA-2025:9073", "cpe": "cpe:/a:redhat:rhel_e4s:9.0", "package": "firefox-0:128.11.0-1.el9_0", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8642", "cpe": "cpe:/a:redhat:rhel_e4s:9.2", "package": "thunderbird-0:128.11.0-1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions", "release_date": "2025-06-09T00:00:00Z"}, {"advisory": "RHSA-2025:9071", "cpe": "cpe:/a:redhat:rhel_e4s:9.2", "package": "firefox-0:128.11.0-1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:8599", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "thunderbird-0:128.11.0-1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-06-05T00:00:00Z"}, {"advisory": "RHSA-2025:9072", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "firefox-0:128.11.0-1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-06-16T00:00:00Z"}], "bugzilla": {"description": "firefox: thunderbird: Memory safety bugs", "id": "2368752", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2368752"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-119", "details": ["Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.", "A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Some memory bugs show evidence of memory corruption, and we presume that with enough effort, some of these could be exploited to run arbitrary code."], "name": "CVE-2025-5268", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/thunderbird-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2025-05-27T12:29:26Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-5268\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-5268\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5268\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2025-46/#CVE-2025-5268"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Moderate"}

{"analysis": {"en": {"generated_at": "2026-04-20T17:05:38.472127+00:00", "value": {"mitigation_remediation": ["Update Firefox to version 139 or later, Thunderbird to version 139 or later, and the ESR releases to 128.11 or later.", "If your environment uses Red Hat Enterprise Linux or Debian, ensure that the latest security updates from the official repositories include the updated browser releases and apply them promptly.", "Until the update can be deployed, consider disabling or uninstalling add-ons that rely on legacy code paths to reduce the attack surface for potential exploitation."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "Mozilla Firefox and Thunderbird users running the vulnerable releases\u2014Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10\u2014are impacted. The issue has been addressed in Firefox 139, Thunderbird 139, Firefox ESR 128.11, and Thunderbird 128.11. Systems using these products should verify their installed version to ensure they are on the fixed releases.", "description_and_impact": "The vulnerability is a memory safety issue that can lead to memory corruption in Mozilla's Firefox and Thunderbird applications, specifically in versions 138 and 128.10. The bugs could, with sufficient effort, allow an attacker to execute arbitrary code, compromising the confidentiality, integrity, and availability of the affected system.", "risk_and_exploitability": "The vulnerability carries a CVSS score of 8.1, indicating high severity. The EPSS score is below 1%, suggesting low but non-zero likelihood of exploitation at this time, and the vulnerability is not listed as a known exploited vulnerability in CISA's KEV catalog. The attack path likely involves memory corruption triggered by user-supplied input, potentially allowing a malicious webpage or email attachment to achieve remote code execution if the exploit is successful."}}}}, "created": "2026-04-20T17:15:12.548520+00:00", "updated": "2026-04-20T17:15:12.548531+00:00", "vendors": []}