CVE-2026-10682

{"id": "CVE-2026-10682", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-10682", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-27T19:00:11.037814Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "vulnerabilities@zephyrproject.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.6, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 4.7, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "vulnerabilities@zephyrproject.org", "affectedData": [{"vendor": "zephyrproject", "product": "zephyr", "versions": [{"status": "affected", "version": "3.0.0", "lessThan": "4.3.1", "versionType": "semver"}, {"status": "affected", "version": "4.4.0", "lessThan": "4.4.2", "versionType": "semver"}], "packageName": "zephyr", "programFiles": ["subsys/logging/log_mgmt.c"], "collectionURL": "https://github.com/zephyrproject-rtos/zephyr", "defaultStatus": "unaffected"}]}], "published": "2026-07-27T19:17:14.070", "references": [{"url": "https://github.com/zephyrproject-rtos/zephyr/commit/56a15114c6acbab2067fe406dc3adda8608f3def", "tags": ["Patch"], "source": "vulnerabilities@zephyrproject.org"}, {"url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-6vqh-mg7h-58qh", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "vulnerabilities@zephyrproject.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "vulnerabilities@zephyrproject.org", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "The userspace verifier z_vrfy_log_filter_set() for the log_filter_set syscall in subsys/logging/log_mgmt.c performed a signed comparison against the int16_t src_id parameter: src_id < (int16_t)log_src_cnt_get(domain_id). Any negative value for src_id (e.g. -1) trivially satisfied this check and was forwarded into z_impl_log_filter_set, where it propagated to filter_set() and ultimately to get_dynamic_filter(), which uses source_id as an unsigned index into the linker-section array &TYPE_SECTION_START(log_dynamic)[source_id].filters.\n\nAfter implicit conversion through uint32_t, an int16_t -1 becomes 0xFFFFFFFF, indexing log_dynamic far out of bounds and causing the kernel to perform an OOB read and an OOB read-modify-write (LOG_FILTER_SLOT_GET/SET) against memory adjacent to the log_dynamic section.\n\nThe written value is a constrained 3-bit log level slot within the targeted 32-bit word, but the target address is attacker-chosen (a small negative offset from log_dynamic) and the write occurs in supervisor mode following a syscall from an unprivileged user thread, providing a kernel memory-corruption / privilege-escalation primitive.\n\nThe defect is reachable on any build with CONFIG_USERSPACE=y and CONFIG_LOG_RUNTIME_FILTERING=y. Present from Zephyr v3.3.0 through v4.4.1. The fix replaces the signed bound check with an unsigned comparison: (uint32_t)src_id < log_src_cnt_get(domain_id), which correctly rejects negative inputs."}, {"lang": "es", "value": "El verificador de espacio de usuario z_vrfy_log_filter_set() para la llamada al sistema log_filter_set en subsys/logging/log_mgmt.c realiz\u00f3 una comparaci\u00f3n con signo contra el par\u00e1metro int16_t src_id: src_id < (int16_t)log_src_cnt_get(domain_id). Cualquier valor negativo para src_id (p. ej., -1) satisfizo trivialmente esta verificaci\u00f3n y fue reenviado a z_impl_log_filter_set, donde se propag\u00f3 a filter_set() y finalmente a get_dynamic_filter(), que utiliza source_id como un \u00edndice sin signo en el array de secci\u00f3n del enlazador &TYPE_SECTION_START(log_dynamic)[source_id].filters.\n\nDespu\u00e9s de la conversi\u00f3n impl\u00edcita a trav\u00e9s de uint32_t, un int16_t -1 se convierte en 0xFFFFFFFF, indexando log_dynamic muy fuera de los l\u00edmites y causando que el kernel realice una lectura fuera de l\u00edmites y una lectura-modificaci\u00f3n-escritura fuera de l\u00edmites (LOG_FILTER_SLOT_GET/SET) contra la memoria adyacente a la secci\u00f3n log_dynamic.\n\nEl valor escrito es una ranura de nivel de registro de 3 bits restringida dentro de la palabra de 32 bits objetivo, pero la direcci\u00f3n objetivo es elegida por el atacante (un peque\u00f1o desplazamiento negativo desde log_dynamic) y la escritura ocurre en modo supervisor despu\u00e9s de una llamada al sistema de un hilo de usuario sin privilegios, proporcionando una primitiva de corrupci\u00f3n de memoria del kernel / escalada de privilegios.\n\nEl defecto es alcanzable en cualquier compilaci\u00f3n con CONFIG_USERSPACE=y y CONFIG_LOG_RUNTIME_FILTERING=y. Presente desde Zephyr v3.3.0 hasta v4.4.1. La soluci\u00f3n reemplaza la verificaci\u00f3n de l\u00edmites con signo con una comparaci\u00f3n sin signo: (uint32_t)src_id < log_src_cnt_get(domain_id), que rechaza correctamente las entradas negativas."}], "lastModified": "2026-10-24T13:10:00.147", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9E51E7D9-61B6-4A4C-9745-001959AEE652", "versionEndExcluding": "4.5.0", "versionStartIncluding": "3.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "vulnerabilities@zephyrproject.org"}