{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "163a203ddb36c36d4a1c942aececda0cc8d06aa7"
            },
            {
              "fixed": "fea6b2e250ff48f10d166011b57a8516ae5438c9"
            },
            {
              "fixed": "0b84571c886719823d537f05f4f07cad6357c4b7"
            },
            {
              "fixed": "ffc0a282462d45fee5957621be5afa29752f3b6d"
            },
            {
              "fixed": "2d31a5073f86a177edf44015e0dedb0c47cfd6d8"
            },
            {
              "fixed": "9370207b36d26e45a8c8ef0500706d37036edd6b"
            },
            {
              "fixed": "1895f7904be71c48f1e6f338b28f24dabd6b8aeb"
            },
            {
              "fixed": "1c0d7c4cde38a887c6d74e0c89ddb25226943c78"
            },
            {
              "fixed": "46066e3a06647c5b186cc6334409722622d05c44"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.12.0"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.168"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.131"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.80"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.21"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43068.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid allocate block from corrupted group in ext4_mb_find_by_goal()\n\nThere's issue as follows:\n...\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 2243 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 2239 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): error count since last fsck: 1\nEXT4-fs (mmcblk0p1): initial error at time 1765597433: ext4_mb_generate_buddy:760\nEXT4-fs (mmcblk0p1): last error at time 1765597433: ext4_mb_generate_buddy:760\n...\n\nAccording to the log analysis, blocks are always requested from the\ncorrupted block group. This may happen as follows:\next4_mb_find_by_goal\n  ext4_mb_load_buddy\n   ext4_mb_load_buddy_gfp\n     ext4_mb_init_cache\n      ext4_read_block_bitmap_nowait\n      ext4_wait_block_bitmap\n       ext4_validate_block_bitmap\n        if (!grp || EXT4_MB_GRP_BBITMAP_CORRUPT(grp))\n         return -EFSCORRUPTED; // There's no logs.\n if (err)\n  return err;  // Will return error\next4_lock_group(ac-\u003eac_sb, group);\n  if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(e4b-\u003ebd_info))) // Unreachable\n   goto out;\n\nAfter commit 9008a58e5dce (\"ext4: make the bitmap read routines return\nreal error codes\") merged, Commit 163a203ddb36 (\"ext4: mark block group\nas corrupt on block bitmap error\") is no real solution for allocating\nblocks from corrupted block groups. This is because if\n'EXT4_MB_GRP_BBITMAP_CORRUPT(e4b-\u003ebd_info)' is true, then\n'ext4_mb_load_buddy()' may return an error. This means that the block\nallocation will fail.\nTherefore, check block group if corrupted when ext4_mb_load_buddy()\nreturns error.",
  "id": "CVE-2026-43068",
  "modified": "2026-07-15T01:48:51.061795634Z",
  "published": "2026-05-05T15:23:27.371Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b84571c886719823d537f05f4f07cad6357c4b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1895f7904be71c48f1e6f338b28f24dabd6b8aeb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c0d7c4cde38a887c6d74e0c89ddb25226943c78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d31a5073f86a177edf44015e0dedb0c47cfd6d8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46066e3a06647c5b186cc6334409722622d05c44"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9370207b36d26e45a8c8ef0500706d37036edd6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fea6b2e250ff48f10d166011b57a8516ae5438c9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ffc0a282462d45fee5957621be5afa29752f3b6d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43068.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43068"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "ext4: avoid allocate block from corrupted group in ext4_mb_find_by_goal()"
}