CVE-2026-39979

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In commits before 2f09060afab23fe9390cce7cb860b10416e1bf5f, the jv_parse_sized() API in libjq accepts a counted buffer with an explicit length parameter, but its error-handling path formats the input buffer using %s in jv_string_fmt(), which reads until a NUL terminator is found rather than respecting the caller-supplied length. This means that when malformed JSON is passed in a non-NUL-terminated buffer, the error construction logic performs an out-of-bounds read past the end of the buffer. The vulnerability is reachable by any libjq consumer calling jv_parse_sized() with untrusted input, and depending on memory layout, can result in memory disclosure or process termination. The issue has been patched in commit 2f09060afab23fe9390cce7cb860b10416e1bf5f."}, {"lang": "es", "value": "jq es un procesador JSON de l\u00ednea de comandos. En commits anteriores a 2f09060afab23fe9390cce7cb860b10416e1bf5f, la API jv_parse_sized() en libjq acepta un b\u00fafer contado con un par\u00e1metro de longitud expl\u00edcito, pero su ruta de manejo de errores formatea el b\u00fafer de entrada usando %s en jv_string_fmt(), que lee hasta que se encuentra un terminador NUL en lugar de respetar la longitud proporcionada por el llamador. Esto significa que cuando se pasa JSON malformado en un b\u00fafer no terminado en NUL, la l\u00f3gica de construcci\u00f3n de errores realiza una lectura fuera de l\u00edmites m\u00e1s all\u00e1 del final del b\u00fafer. La vulnerabilidad es alcanzable por cualquier consumidor de libjq que llama a jv_parse_sized() con entrada no confiable, y, dependiendo de la disposici\u00f3n de la memoria, puede resultar en divulgaci\u00f3n de memoria o terminaci\u00f3n del proceso. El problema ha sido parcheado en el commit 2f09060afab23fe9390cce7cb860b10416e1bf5f."}], "lastModified": "2026-10-26T22:10:00.163", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:jqlang:jq:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "33B35B19-67AD-450E-A887-48A290566047", "versionEndExcluding": "1.8.2"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:redhat:ai_inference_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1319106A-2804-4C1D-BF3D-A146C3FA15B6", "versionEndExcluding": "3.2.2", "versionStartIncluding": "3.2.0"}, {"criteria": "cpe:2.3:a:redhat:ai_inference_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2362D6FF-6951-43A5-9CB7-7F7DBF7E095B", "versionEndExcluding": "3.3.5", "versionStartIncluding": "3.3.0"}, {"criteria": "cpe:2.3:a:redhat:ansible_automation_platform:2.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": 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