{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-54021",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-54021"
  ],
  "published": "2025-12-24T10:57:20Z",
  "summary": "ext4: set goal start correctly in ext4_mb_normalize_request",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: set goal start correctly in ext4_mb_normalize_request\n\nWe need to set ac_g_ex to notify the goal start used in\next4_mb_find_by_goal. Set ac_g_ex instead of ac_f_ex in\next4_mb_normalize_request.\nBesides we should assure goal start is in range [first_data_block,\nblocks_count) as ext4_mb_initialize_context does.\n\n[ Added a check to make sure size is less than ar->pright; otherwise\n  we could end up passing an underflowed value of ar->pright - size to\n  ext4_get_group_no_and_offset(), which will trigger a BUG_ON later on.\n  - TYT ]",
  "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": "6.1.30"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-54021"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2479bb6cbdb4d56b807bbe5229e3e26a6f1f4530"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/390eee955d4de4662db5e3e9e9a9eae020432cb7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cee78217a7ae72d11c2e21e1a5263b8044489823"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3ca3005b502ca8ea87d6a344323b179b48c4e4a3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bc4a3e1d07a86ae5845321d371190244acacb2f2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c6bee8970075b256fc1b07bf4873049219380818"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/abb330ffaa3a0ae7ce632e28c9260b461c01f19f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b07ffe6927c75d99af534d685282ea188d9f71a6"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}