CVE-2024-39461

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As noted in that change, the __counted_by member must be\ninitialized with the number of elements before the first array access\nhappens, otherwise there will be a warning from each access prior to the\ninitialization because the number of elements is zero. This occurs in\nraspberrypi_discover_clocks() due to ->num being assigned after ->hws\nhas been accessed:\n\n UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-raspberrypi.c:374:4\n index 3 is out of range for type 'struct clk_hw *[] __counted_by(num)' (aka 'struct clk_hw *[]')\n\nMove the ->num initialization to before the first access of ->hws, which\nclears up the warning."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: clk: bcm: rpi: Assign ->num before accessing ->hws Commit f316cdff8d67 (\"clk: Annotate struct clk_hw_onecell_data with __counted_by\") anot\u00f3 el miembro hws de 'struct clk_hw_onecell_data' con __counted_by, que informa al sanitizante de los l\u00edmites sobre la cantidad de elementos en hws, para que pueda advertir cuando se accede a hws fuera de los l\u00edmites. Como se se\u00f1al\u00f3 en ese cambio, el miembro __counted_by debe inicializarse con la cantidad de elementos antes de que ocurra el primer acceso a la matriz; de lo contrario, habr\u00e1 una advertencia de cada acceso antes de la inicializaci\u00f3n porque la cantidad de elementos es cero. Esto ocurre en raspberrypi_discover_clocks() debido a que ->num se asigna despu\u00e9s de que se haya accedido a ->hws: UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-raspberrypi.c:374:4 index 3 est\u00e1 fuera del rango para el tipo 'struct clk_hw *[] __counted_by(num)' (tambi\u00e9n conocido como 'struct clk_hw *[]') Mueva la inicializaci\u00f3n ->num antes del primer acceso de ->hws, lo que borra la advertencia."}], "id": "CVE-2024-39461", "lastModified": "2026-06-17T07:41:57.647", "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-2024-39461", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T17:08:08.266580Z", "version": "2.0.3"}}]}, "published": "2024-06-25T15:15:14.500", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6dc445c1905096b2ed4db1a84570375b4e00cc0f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9562dbe5cdbb16ac887d27ef6f179980bb99193c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cdf9c7871d58d3df59d2775982e3533adb8ec920"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6dc445c1905096b2ed4db1a84570375b4e00cc0f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9562dbe5cdbb16ac887d27ef6f179980bb99193c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cdf9c7871d58d3df59d2775982e3533adb8ec920"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-129"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: clk: bcm: rpi: Assign ->num before accessing ->hws", "id": "2294293", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2294293"}, "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-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nclk: bcm: rpi: Assign ->num before accessing ->hws\nCommit f316cdff8d67 (\"clk: Annotate struct clk_hw_onecell_data with\n__counted_by\") annotated the hws member of 'struct clk_hw_onecell_data'\nwith __counted_by, which informs the bounds sanitizer about the number\nof elements in hws, so that it can warn when hws is accessed out of\nbounds. As noted in that change, the __counted_by member must be\ninitialized with the number of elements before the first array access\nhappens, otherwise there will be a warning from each access prior to the\ninitialization because the number of elements is zero. This occurs in\nraspberrypi_discover_clocks() due to ->num being assigned after ->hws\nhas been accessed:\nUBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-raspberrypi.c:374:4\nindex 3 is out of range for type 'struct clk_hw *[] __counted_by(num)' (aka 'struct clk_hw *[]')\nMove the ->num initialization to before the first access of ->hws, which\nclears up the warning."], "name": "CVE-2024-39461", "package_state": [{"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": "2024-06-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-39461\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-39461\nhttps://lore.kernel.org/linux-cve-announce/2024062512-CVE-2024-39461-cdbc@gregkh/T"], "threat_severity": "Low"}

{}