CVE-2025-43343

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This issue is fixed in Safari 26, iOS 26 and iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, watchOS 26. Processing maliciously crafted web content may lead to an unexpected process crash."}, {"lang": "es", "value": "El problema se abord\u00f3 con una gesti\u00f3n de memoria mejorada. Este problema est\u00e1 solucionado en Safari 26, tvOS 26, watchOS 26, iOS 26 y iPadOS 26, visionOS 26. El procesamiento de contenido web creado maliciosamente puede provocar un cierre inesperado del proceso."}], "id": "CVE-2025-43343", "lastModified": "2026-10-18T21:10:00.120", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-43343", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-09-16T13:36:38.705148Z", "version": "2.0.3"}}]}, "published": "2025-09-15T23:15:36.603", "references": [{"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/125108"}, {"source": "product-security@apple.com", "url": "https://support.apple.com/en-us/125110"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/125113"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/125114"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/125115"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/125116"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2025/Sep/49"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2025/Sep/53"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2025/Sep/57"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2025/Sep/59"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2025/10/13/4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2025:19946"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security-tracker.debian.org/tracker/CVE-2025-43343"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://ubuntu.com/security/CVE-2025-43343"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://webkitgtk.org/security/WSA-2025-0007.html"}], "sourceIdentifier": "product-security@apple.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash", "id": "2403598", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2403598"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-119", "details": ["The issue was addressed with improved memory handling. This issue is fixed in tvOS 26, Safari 26, visionOS 26, watchOS 26, macOS Tahoe 26, iOS 26 and iPadOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.", "A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling."], "mitigation": {"lang": "en:us", "value": "Do not process or load untrusted web content with WebKitGTK.\nIn Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp.\nThis vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction.\nTo mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface.\nAdditionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality."}, "name": "CVE-2025-43343", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "webkitgtk", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "webkitgtk3", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "webkitgtk4", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "webkit2gtk3", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "webkit2gtk3", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-10-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-43343\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-43343\nhttps://webkitgtk.org/security/WSA-2025-0007.html"], "statement": "To exploit this flaw, an attacker needs to trick a user into processing or loading malicious web content.", "threat_severity": "Important"}

{"analysis": {"en": {"generated_at": "2026-04-27T23:57:19.222931+00:00", "value": {"mitigation_remediation": ["Apply the latest Apple software updates that include the WebKit patch (Safari 26, iOS\u202f26, iPadOS\u202f26, macOS\u202f26, tvOS\u202f26, visionOS\u202f26 and watchOS\u202f26).", "If you use webkitgtk or wpe_webkit in your environment, upgrade to the most recent build that contains the memory\u2011handling fix, such as the release referenced in the WebKit security advisory WSA\u20112025\u20110007.", "As a temporary measure, restrict or sandbox untrusted web content\u2014e.g., disable JavaScript in untrusted contexts or employ a content\u2011filtering proxy\u2014until the official patch is applied."], "summary": {"action": "Immediate Patch", "impact": "Denial of Service (unexpected process crash)"}, "threat_synthesis": {"affected_systems": "The flaw affects Apple\u2019s WebKit\u2011based platforms, including Safari, iOS, iPadOS, macOS, tvOS, visionOS and watchOS. It also applies to open\u2011source variants such as webkitgtk and wpe_webkit. Apple releases a patch in version 26 of each of the major products (Safari 26, iOS 26, iPadOS 26, macOS 26, tvOS 26, visionOS 26 and watchOS 26), which contains the improved memory handling. Earlier releases lacking these fixes remain vulnerable.", "description_and_impact": "A memory handling flaw in WebKit can be triggered by maliciously crafted web content, causing the rendering process to crash. The vulnerability is classified as CWE-119 and is scored highly on CVSS (9.8), indicating a severe problem that can result in a denial of service to users viewing affected content. Because the bug only causes a crash rather than arbitrary code execution, the direct impact is interruption of service and potential loss of session state, but it does not expose data or privileges beyond the user of the affected application.", "risk_and_exploitability": "The CVSS score of 9.8 signals a critical severity, while the EPSS score of less than 1% indicates that, so far, exploitation attempts are extremely rare. The vulnerability is not listed in CISA\u2019s KEV catalog, suggesting no known active exploitation in the wild. Attackers can trigger the crash by delivering specially crafted web pages that exploit the unsafe memory usage in the rendering engine, typically via a normal web\u2011browser session. Infected browsers would terminate the WebKit process, effectively causing a denial\u2011of\u2011service condition for the user or client application."}}}}, "created": "2025-09-17T10:05:16.343409+00:00", "updated": "2026-04-28T00:00:18.130867+00:00", "vendors": ["apple", "apple$PRODUCT$ios", "apple$PRODUCT$ipados", "apple$PRODUCT$macos", "apple$PRODUCT$safari", "apple$PRODUCT$tvos", "apple$PRODUCT$visionos", "apple$PRODUCT$watchos"]}