fkie_cve-2024-27058
Vulnerability from fkie_nvd
Published
2024-05-01 13:15
Modified
2024-11-21 09:03
Severity ?
4.7 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Summary
In the Linux kernel, the following vulnerability has been resolved: tmpfs: fix race on handling dquot rbtree A syzkaller reproducer found a race while attempting to remove dquot information from the rb tree. Fetching the rb_tree root node must also be protected by the dqopt->dqio_sem, otherwise, giving the right timing, shmem_release_dquot() will trigger a warning because it couldn't find a node in the tree, when the real reason was the root node changing before the search starts: Thread 1 Thread 2 - shmem_release_dquot() - shmem_{acquire,release}_dquot() - fetch ROOT - Fetch ROOT - acquire dqio_sem - wait dqio_sem - do something, triger a tree rebalance - release dqio_sem - acquire dqio_sem - start searching for the node, but from the wrong location, missing the node, and triggering a warning.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a69b6b3a026543bc215ccc866d0aea5579e6ce2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7077f43f30d817d10a9f8245e51576ac114b2f0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f82f184874d2761ebaa60dccf577921a0dbb3810
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0a69b6b3a026543bc215ccc866d0aea5579e6ce2
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c7077f43f30d817d10a9f8245e51576ac114b2f0
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f82f184874d2761ebaa60dccf577921a0dbb3810
Impacted products
Vendor Product Version


To clipboard 

{
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         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.",
      },
      {
         lang: "es",
         value: "En el kernel de Linux, se resolvió la siguiente vulnerabilidad: tmpfs: corrige la ejecución al manejar dquot rbtree Un reproductor syzkaller encontró una ejecución al intentar eliminar información de dquot del árbol rb. La recuperación del nodo raíz de rb_tree también debe estar protegida por dqopt->dqio_sem; de lo contrario, si se da el momento adecuado, shmem_release_dquot() activará una advertencia porque no pudo encontrar un nodo en el árbol, cuando la verdadera razón era el nodo raíz. cambiando antes de que comience la búsqueda: 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 árbol - liberar dqio_sem - adquirir dqio_sem - comienza a buscar el nodo, pero desde la ubicación incorrecta, pierde el nodo y genera una advertencia.",
      },
   ],
   id: "CVE-2024-27058",
   lastModified: "2024-11-21T09:03:46.217",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "LOW",
               baseScore: 4.7,
               baseSeverity: "MEDIUM",
               confidentialityImpact: "LOW",
               integrityImpact: "LOW",
               privilegesRequired: "HIGH",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L",
               version: "3.1",
            },
            exploitabilityScore: 1.2,
            impactScore: 3.4,
            source: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            type: "Secondary",
         },
      ],
   },
   published: "2024-05-01T13:15:50.450",
   references: [
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         url: "https://git.kernel.org/stable/c/0a69b6b3a026543bc215ccc866d0aea5579e6ce2",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         url: "https://git.kernel.org/stable/c/617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         url: "https://git.kernel.org/stable/c/c7077f43f30d817d10a9f8245e51576ac114b2f0",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         url: "https://git.kernel.org/stable/c/f82f184874d2761ebaa60dccf577921a0dbb3810",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         url: "https://git.kernel.org/stable/c/0a69b6b3a026543bc215ccc866d0aea5579e6ce2",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         url: "https://git.kernel.org/stable/c/617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         url: "https://git.kernel.org/stable/c/c7077f43f30d817d10a9f8245e51576ac114b2f0",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         url: "https://git.kernel.org/stable/c/f82f184874d2761ebaa60dccf577921a0dbb3810",
      },
   ],
   sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
   vulnStatus: "Awaiting Analysis",
}


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