{
  "id": "CVE-2022-48872",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-08-21T07:15:04.267",
  "lastModified": "2024-08-21T07:15:04.267",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: Fix use-after-free race condition for maps\n\nIt is possible that in between calling fastrpc_map_get() until\nmap->fl->lock is taken in fastrpc_free_map(), another thread can call\nfastrpc_map_lookup() and get a reference to a map that is about to be\ndeleted.\n\nRewrite fastrpc_map_get() to only increase the reference count of a map\nif it's non-zero. Propagate this to callers so they can know if a map is\nabout to be deleted.\n\nFixes this warning:\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 5 PID: 10100 at lib/refcount.c:25 refcount_warn_saturate\n...\nCall trace:\n refcount_warn_saturate\n [fastrpc_map_get inlined]\n [fastrpc_map_lookup inlined]\n fastrpc_map_create\n fastrpc_internal_invoke\n fastrpc_device_ioctl\n __arm64_sys_ioctl\n invoke_syscall"
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/079c78c68714f7d8d58e66c477b0243b31806907",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/556dfdb226ce1e5231d8836159b23f8bb0395bf4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/61a0890cb95afec5c8a2f4a879de2b6220984ef1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/96b328d119eca7563c1edcc4e1039a62e6370ecb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b171d0d2cf1b8387c72c8d325c5d5746fa271e39",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}