{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-53421",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-53421"
  ],
  "published": "2025-09-18T16:08:26Z",
  "summary": "blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()\n\nWhen blkg_alloc() is called to allocate a blkcg_gq structure\nwith the associated blkg_iostat_set's, there are 2 fields within\nblkg_iostat_set that requires proper initialization - blkg & sync.\nThe former field was introduced by commit 3b8cc6298724 (\"blk-cgroup:\nOptimize blkcg_rstat_flush()\") while the later one was introduced by\ncommit f73316482977 (\"blk-cgroup: reimplement basic IO stats using\ncgroup rstat\").\n\nUnfortunately those fields in the blkg_iostat_set's are not properly\nre-initialized when they are cleared in v1's blkcg_reset_stats(). This\ncan lead to a kernel panic due to NULL pointer access of the blkg\npointer. The missing initialization of sync is less problematic and\ncan be a problem in a debug kernel due to missing lockdep initialization.\n\nFix these problems by re-initializing them after memory clearing.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
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        "1:6.1.47-1+rpt4",
        "1:6.1.54-1+rpt2",
        "1:6.1.58-1+rpt2",
        "1:6.1.63-1+rpt1",
        "1:6.1.73-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
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            "binary_version": "1:6.1.21-1+rpt1"
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            "binary_version": "1:6.1.47-1+rpt2"
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-53421"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/58c135513562698f222a58ba07dbdfcfb268aa0d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0561aa6033dd181594116d705c41fc16e97161a2"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/892faa76be894d324bf48b12a55c7af7be2bad83"
    },
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      "url": "https://git.kernel.org/stable/c/b0d26283af612b9e0cc3188b0b88ad7fdea447e8"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/abbce7f82613ea5eeefd0fc3c1c8e449b9cef2a2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3d2af77e31ade05ff7ccc3658c3635ec1bea0979"
    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-06-01T16:09:41Z"
  }
}