CVE-2026-43005

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{}

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When this happens, tps53679_identify_chip() accesses buf[ret - 1]\nwhich is buf[-1], reading one byte before the buffer on the stack.\n\nFix by changing the check from \"ret < 0\" to \"ret <= 0\", treating a\nzero-length read as an error (-EIO), which prevents the out-of-bounds\narray access.\n\nAlso fix a typo in the adjacent comment: \"if present\" instead of\nduplicate \"if\"."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: hwmon: (tps53679) Corrige el acceso a array con lectura de bloque de longitud cero i2c_smbus_read_block_data() puede devolver 0, indicando una lectura de longitud cero. Cuando esto ocurre, tps53679_identify_chip() accede a buf[ret - 1], que es buf[-1], leyendo un byte antes del b\u00fafer en la pila. Se corrige cambiando la comprobaci\u00f3n de \u2019ret menor que 0\u2019 a \u2019ret menor o igual que 0\u2019, tratando una lectura de longitud cero como un error (-EIO), lo que evita el acceso a array fuera de l\u00edmites. Tambi\u00e9n se corrige una errata en el comentario adyacente: \u2019if present\u2019 en lugar del \u2019if\u2019 duplicado."}], "id": "CVE-2026-43005", "lastModified": "2026-11-11T23:10:00.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-01T15:16:44.343", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0e211f6aaa6a00fd0ee0c1eea5498f168c6725e6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6999b4769e2a61c463158927102e8c07e3f69ba2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/79b7e588399bb55f4c10bea6ca41b6c3b944d2bb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: hwmon: (tps53679) Fix array access with zero-length block read", "id": "2464498", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464498"}, "csaw": false, "cwe": "CWE-786", "details": ["A flaw was found in the Linux kernel's tps53679 hwmon driver. When the `i2c_smbus_read_block_data()` function returns a zero-length read, the `tps53679_identify_chip()` function attempts to access memory before the allocated buffer. This out-of-bounds read could lead to information disclosure or a denial of service."], "name": "CVE-2026-43005", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "2026-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43005\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43005\nhttps://lore.kernel.org/linux-cve-announce/2026050153-CVE-2026-43005-d389@gregkh/T"]}

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