CVE-2026-43264

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When the\nerror paths at lines 184 or 192 jump to 'entryfail', native_mode's\nrefcount is not decremented, causing a refcount leak.\n\nFix this by changing the goto target from 'entryfail' to 'timingfail',\nwhich properly calls of_node_put(native_mode) before cleanup."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nfbdev: of: display_timing: corregir fuga de refcount en of_get_display_timings()\n\nof_parse_phandle() devuelve un device_node con el refcount incrementado, el cual se almacena en \u2019entry\u2019 y luego se copia a \u2019native_mode\u2019. Cuando las rutas de error en las l\u00edneas 184 o 192 saltan a \u2019entryfail\u2019, el refcount de native_mode no se decrementa, causando una fuga de refcount.\n\nSolucione esto cambiando el objetivo goto de \u2019entryfail\u2019 a \u2019timingfail\u2019, el cual llama correctamente a of_node_put(native_mode) antes de la limpieza."}], "id": "CVE-2026-43264", "lastModified": "2026-11-11T23:10:00.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43264", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T15:32:25.040393Z", "version": "2.0.3"}}]}, "published": "2026-05-06T12:16:47.373", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/20881ad42e651c69d89eb38a2042838187900fd6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2b22e4fe1273c24f405ed7903349c4bbd82b6368"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3ed019654234edb8625c05d05e15d40f74e64f70"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/69290f2d3999c5fa1a7f5d5593cfc5461fa3ee64"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b5bdcc5afbff845834d04d651773cb6b47db5dd3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c5734f9030a8b1e13868d1641b5163d8e659306e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d6f34bbff07476c6abb8672c89d217824871c5ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/eacf9840ae1285a1ef47eb0ce16d786e542bd4d7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: fbdev: of: display_timing: fix refcount leak in of_get_display_timings()", "id": "2467204", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467204"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-911", "details": ["A flaw was found in the Linux kernel's fbdev (framebuffer device) subsystem. This vulnerability, a reference count (refcount) leak, occurs within the of_get_display_timings() function. Specifically, when of_parse_phandle() returns a device_node with an incremented refcount, certain error paths fail to decrement this count. This can lead to resource exhaustion, potentially resulting in a denial of service (DoS) for affected systems."], "name": "CVE-2026-43264", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43264\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43264\nhttps://lore.kernel.org/linux-cve-announce/2026050608-CVE-2026-43264-7177@gregkh/T"], "threat_severity": "Low"}

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