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https://github.com/fkie-cad/nvd-json-data-feeds.git
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36 lines
2.8 KiB
JSON
36 lines
2.8 KiB
JSON
{
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"id": "CVE-2024-27058",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2024-05-01T13:15:50.450",
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"lastModified": "2024-05-01T19:50:25.633",
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"vulnStatus": "Awaiting Analysis",
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntmpfs: fix race on handling dquot rbtree\n\nA syzkaller reproducer found a race while attempting to remove dquot\ninformation from the rb tree.\n\nFetching the rb_tree root node must also be protected by the\ndqopt->dqio_sem, otherwise, giving the right timing, shmem_release_dquot()\nwill trigger a warning because it couldn't find a node in the tree, when\nthe real reason was the root node changing before the search starts:\n\nThread 1\t\t\t\tThread 2\n- shmem_release_dquot()\t\t\t- shmem_{acquire,release}_dquot()\n\n- fetch ROOT\t\t\t\t- Fetch ROOT\n\n\t\t\t\t\t- acquire dqio_sem\n- wait dqio_sem\n\n\t\t\t\t\t- do something, triger a tree rebalance\n\t\t\t\t\t- release dqio_sem\n\n- acquire dqio_sem\n- start searching for the node, but\n from the wrong location, missing\n the node, and triggering a warning."
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},
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{
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"lang": "es",
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"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: tmpfs: corrige la ejecuci\u00f3n al manejar dquot rbtree Un reproductor syzkaller encontr\u00f3 una ejecuci\u00f3n al intentar eliminar informaci\u00f3n de dquot del \u00e1rbol rb. La recuperaci\u00f3n del nodo ra\u00edz de rb_tree tambi\u00e9n debe estar protegida por dqopt->dqio_sem; de lo contrario, si se da el momento adecuado, shmem_release_dquot() activar\u00e1 una advertencia porque no pudo encontrar un nodo en el \u00e1rbol, cuando la verdadera raz\u00f3n era el nodo ra\u00edz. cambiando antes de que comience la b\u00fasqueda: Hilo 1 Hilo 2 - shmem_release_dquot() - shmem_{acquire,release}_dquot() - buscar ROOT - Obtener ROOT - adquirir dqio_sem - esperar dqio_sem - hacer algo, activar un reequilibrio de \u00e1rbol - liberar dqio_sem - adquirir dqio_sem - comienza a buscar el nodo, pero desde la ubicaci\u00f3n incorrecta, pierde el nodo y genera una advertencia."
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/0a69b6b3a026543bc215ccc866d0aea5579e6ce2",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/c7077f43f30d817d10a9f8245e51576ac114b2f0",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/f82f184874d2761ebaa60dccf577921a0dbb3810",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}
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]
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} |