fkie_cve-2025-38212
Vulnerability from fkie_nvd
Published
2025-07-04 14:15
Modified
2025-07-08 16:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ipc: fix to protect IPCS lookups using RCU syzbot reported that it discovered a use-after-free vulnerability, [0] [0]: https://lore.kernel.org/all/67af13f8.050a0220.21dd3.0038.GAE@google.com/ idr_for_each() is protected by rwsem, but this is not enough. If it is not protected by RCU read-critical region, when idr_for_each() calls radix_tree_node_free() through call_rcu() to free the radix_tree_node structure, the node will be freed immediately, and when reading the next node in radix_tree_for_each_slot(), the already freed memory may be read. Therefore, we need to add code to make sure that idr_for_each() is protected within the RCU read-critical region when we call it in shm_destroy_orphaned().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5180561afff8e0f029073c8c8117c95c6512d1f9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5f1e1573bf103303944fd7225559de5d8297539c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/68c173ea138b66d7dd1fd980c9bc578a18e11884
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/74bc813d11c30e28fc5261dc877cca662ccfac68
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/78297d53d3878d43c1d627d20cd09f611fa4b91d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b0b6bf90ce2699a574b3683e22c44d0dcdd7a057
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b968ba8bfd9f90914957bbbd815413bf6a98eca7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d66adabe91803ef34a8b90613c81267b5ded1472
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipc: fix to protect IPCS lookups using RCU\n\nsyzbot reported that it discovered a use-after-free vulnerability, [0]\n\n[0]: https://lore.kernel.org/all/67af13f8.050a0220.21dd3.0038.GAE@google.com/\n\nidr_for_each() is protected by rwsem, but this is not enough.  If it is\nnot protected by RCU read-critical region, when idr_for_each() calls\nradix_tree_node_free() through call_rcu() to free the radix_tree_node\nstructure, the node will be freed immediately, and when reading the next\nnode in radix_tree_for_each_slot(), the already freed memory may be read.\n\nTherefore, we need to add code to make sure that idr_for_each() is\nprotected within the RCU read-critical region when we call it in\nshm_destroy_orphaned()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ipc: correcci\u00f3n para proteger las b\u00fasquedas IPCS mediante RCU. syzbot inform\u00f3 del descubrimiento de una vulnerabilidad de use-after-free, [0] [0]: https://lore.kernel.org/all/67af13f8.050a0220.21dd3.0038.GAE@google.com/ idr_for_each() est\u00e1 protegido por rwsem, pero esto no es suficiente. Si no est\u00e1 protegido por la regi\u00f3n cr\u00edtica de lectura de RCU, cuando idr_for_each() llama a radix_tree_node_free() mediante call_rcu() para liberar la estructura radix_tree_node, el nodo se liberar\u00e1 inmediatamente y, al leer el siguiente nodo en radix_tree_for_each_slot(), se podr\u00e1 leer la memoria ya liberada. Por lo tanto, necesitamos agregar c\u00f3digo para asegurarnos de que idr_for_each() est\u00e9 protegido dentro de la regi\u00f3n cr\u00edtica de lectura de RCU cuando lo llamamos en shm_destroy_orphaned()."
    }
  ],
  "id": "CVE-2025-38212",
  "lastModified": "2025-07-08T16:18:53.607",
  "metrics": {},
  "published": "2025-07-04T14:15:29.473",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5180561afff8e0f029073c8c8117c95c6512d1f9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5f1e1573bf103303944fd7225559de5d8297539c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/68c173ea138b66d7dd1fd980c9bc578a18e11884"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/74bc813d11c30e28fc5261dc877cca662ccfac68"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/78297d53d3878d43c1d627d20cd09f611fa4b91d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b0b6bf90ce2699a574b3683e22c44d0dcdd7a057"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b968ba8bfd9f90914957bbbd815413bf6a98eca7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d66adabe91803ef34a8b90613c81267b5ded1472"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.