{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-53832",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-53832"
  ],
  "published": "2025-12-09T01:31:24Z",
  "summary": "md/raid10: fix null-ptr-deref in raid10_sync_request",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid10: fix null-ptr-deref in raid10_sync_request\n\ninit_resync() inits mempool and sets conf->have_replacemnt at the beginning\nof sync, close_sync() frees the mempool when sync is completed.\n\nAfter [1] recovery might be skipped and init_resync() is called but\nclose_sync() is not. null-ptr-deref occurs with r10bio->dev[i].repl_bio.\n\nThe following is one way to reproduce the issue.\n\n  1) create a array, wait for resync to complete, mddev->recovery_cp is set\n     to MaxSector.\n  2) recovery is woken and it is skipped. conf->have_replacement is set to\n     0 in init_resync(). close_sync() not called.\n  3) some io errors and rdev A is set to WantReplacement.\n  4) a new device is added and set to A's replacement.\n  5) recovery is woken, A have replacement, but conf->have_replacemnt is\n     0. r10bio->dev[i].repl_bio will not be alloced and null-ptr-deref\n     occurs.\n\nFix it by not calling init_resync() if recovery skipped.\n\n[1] commit 7e83ccbecd60 (\"md/raid10: Allow skipping recovery when clean arrays are assembled\")",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.21-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v6",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v7",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v7l",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v8",
            "binary_version": "1:6.1.21-1+rpt1"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.21-1+rpt1": {
            "linux_commit": "0afb5e98488aed7017b9bf321b575d0177feb7ed",
            "upstream_version": "6.1.21",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.28"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-53832"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/38d33593260536840b49fd1dcac9aedfd14a9d42"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/14964127be77884003976a392c9faa9ebaabbbe1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bdbf104b1c91fbf38f82c522ebf75429f094292a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/68695084077e3de9d3e94e09238ace2b6f246446"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b50fd1c3d9d0175aa29ff2706ef36cc178bc356a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/99b503e4edc5938885d839cf0e7571963f75d800"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9e9efc77efd1956cc244af975240f2513d78a371"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a405c6f0229526160aa3f177f65e20c86fce84c5"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}