FKIE_CVE-2026-46251

Vulnerability from fkie_nvd - Published: 2026-06-03 18:16 - Updated: 2026-06-09 20:38
Severity
8.4 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix block_group_tree dirty_list corruption When the incompat flag EXTENT_TREE_V2 is set, we unconditionally add the block group tree to the switch_commits list before calling switch_commit_roots, as we do for the tree root and the chunk root. However, the block group tree uses normal root dirty tracking and in any transaction that does an allocation and dirties a block group, the block group root will already be linked to a list by the dirty_list field and this use of list_add_tail() is invalid and corrupts the prev/next members of block_group_root->dirty_list. This is apparent on a subsequent list_del on the prev if we enable CONFIG_DEBUG_LIST: [32.1571] ------------[ cut here ]------------ [32.1572] list_del corruption. next->prev should beffff958890202538, but was ffff9588992bd538. (next=ffff958890201538) [32.1575] WARNING: lib/list_debug.c:65 at 0x0, CPU#3: sync/607 [32.1583] CPU: 3 UID: 0 PID: 607 Comm: sync Not tainted 6.18.0 #24PREEMPT(none) [32.1585] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS1.17.0-4.fc41 04/01/2014 [32.1587] RIP: 0010:__list_del_entry_valid_or_report+0x108/0x120 [32.1593] RSP: 0018:ffffaa288287fdd0 EFLAGS: 00010202 [32.1594] RAX: 0000000000000001 RBX: ffff95889326e800 RCX:ffff958890201538 [32.1596] RDX: ffff9588992bd538 RSI: ffff958890202538 RDI:ffffffff82a41e00 [32.1597] RBP: ffff958890202538 R08: ffffffff828fc1e8 R09:00000000ffffefff [32.1599] R10: ffffffff8288c200 R11: ffffffff828e4200 R12:ffff958890201538 [32.1601] R13: ffff95889326e958 R14: ffff958895c24000 R15:ffff958890202538 [32.1603] FS: 00007f0c28eb5740(0000) GS:ffff958af2bd2000(0000)knlGS:0000000000000000 [32.1605] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [32.1607] CR2: 00007f0c28e8a3cc CR3: 0000000109942005 CR4:0000000000370ef0 [32.1609] Call Trace: [32.1610] <TASK> [32.1611] switch_commit_roots+0x82/0x1d0 [btrfs] [32.1615] btrfs_commit_transaction+0x968/0x1550 [btrfs] [32.1618] ? btrfs_attach_transaction_barrier+0x23/0x60 [btrfs] [32.1621] __iterate_supers+0xe8/0x190 [32.1622] ? __pfx_sync_fs_one_sb+0x10/0x10 [32.1623] ksys_sync+0x63/0xb0 [32.1624] __do_sys_sync+0xe/0x20 [32.1625] do_syscall_64+0x73/0x450 [32.1626] entry_SYSCALL_64_after_hwframe+0x76/0x7e [32.1627] RIP: 0033:0x7f0c28d05d2b [32.1632] RSP: 002b:00007ffc9d988048 EFLAGS: 00000246 ORIG_RAX:00000000000000a2 [32.1634] RAX: ffffffffffffffda RBX: 00007ffc9d988228 RCX:00007f0c28d05d2b [32.1636] RDX: 00007f0c28e02301 RSI: 00007ffc9d989b21 RDI:00007f0c28dba90d [32.1637] RBP: 0000000000000001 R08: 0000000000000001 R09:0000000000000000 [32.1639] R10: 0000000000000000 R11: 0000000000000246 R12:000055b96572cb80 [32.1641] R13: 000055b96572b19f R14: 00007f0c28dfa434 R15:000055b96572b034 [32.1643] </TASK> [32.1644] irq event stamp: 0 [32.1644] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [32.1646] hardirqs last disabled at (0): [<ffffffff81298817>]copy_process+0xb37/0x2260 [32.1648] softirqs last enabled at (0): [<ffffffff81298817>]copy_process+0xb37/0x2260 [32.1650] softirqs last disabled at (0): [<0000000000000000>] 0x0 [32.1652] ---[ end trace 0000000000000000 ]--- Furthermore, this list corruption eventually (when we happen to add a new block group) results in getting the switch_commits and dirty_cowonly_roots lists mixed up and attempting to call update_root on the tree root which can't be found in the tree root, resulting in a transaction abort: [87.8269] BTRFS critical (device nvme1n1): unable to find root key (1 0 0) in tree 1 [87.8272] ------------[ cut here ]------------ [87.8274] BTRFS: Transaction aborted (error -117) [87.8275] WARNING: fs/btrfs/root-tree.c:153 at 0x0, CPU#4: sync/703 [87.8285] CPU: 4 UID: 0 PID: 703 Comm: sync Not tainted 6.18.0 #25 PREEMPT(none) [87.8287] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-4.fc41 0 ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/201091da34c4f113af6b4a7407091c39bf29d4caPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3a1f4264daed4b419c325a7fe35e756cada3cf82Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4eb830847d84276f1c8ea46541cfeeedaba1fb63Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6e10283b5519d987d880d71bec90cdc7f2ec62b3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/80e1fda9c084dcf54819a12bc7682ec0afd2d8f4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e3d1fd084319f8f0830b22f014c7af6a96b4497bPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2B225BF5-A395-474D-B3BC-E33E67B2BCEE",
              "versionEndExcluding": "6.1.165",
              "versionStartIncluding": "6.0.19",
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix block_group_tree dirty_list corruption\n\nWhen the incompat flag EXTENT_TREE_V2 is set, we unconditionally add the\nblock group tree to the switch_commits list before calling\nswitch_commit_roots, as we do for the tree root and the chunk root.\nHowever, the block group tree uses normal root dirty tracking and in any\ntransaction that does an allocation and dirties a block group, the block\ngroup root will already be linked to a list by the dirty_list field and\nthis use of list_add_tail() is invalid and corrupts the prev/next\nmembers of block_group_root-\u003edirty_list.\n\nThis is apparent on a subsequent list_del on the prev if we enable\nCONFIG_DEBUG_LIST:\n\n  [32.1571] ------------[ cut here ]------------\n  [32.1572] list_del corruption. next-\u003eprev should beffff958890202538, but was ffff9588992bd538. (next=ffff958890201538)\n  [32.1575] WARNING: lib/list_debug.c:65 at 0x0, CPU#3: sync/607\n  [32.1583] CPU: 3 UID: 0 PID: 607 Comm: sync Not tainted 6.18.0 #24PREEMPT(none)\n  [32.1585] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS1.17.0-4.fc41 04/01/2014\n  [32.1587] RIP: 0010:__list_del_entry_valid_or_report+0x108/0x120\n  [32.1593] RSP: 0018:ffffaa288287fdd0 EFLAGS: 00010202\n  [32.1594] RAX: 0000000000000001 RBX: ffff95889326e800 RCX:ffff958890201538\n  [32.1596] RDX: ffff9588992bd538 RSI: ffff958890202538 RDI:ffffffff82a41e00\n  [32.1597] RBP: ffff958890202538 R08: ffffffff828fc1e8 R09:00000000ffffefff\n  [32.1599] R10: ffffffff8288c200 R11: ffffffff828e4200 R12:ffff958890201538\n  [32.1601] R13: ffff95889326e958 R14: ffff958895c24000 R15:ffff958890202538\n  [32.1603] FS:  00007f0c28eb5740(0000) GS:ffff958af2bd2000(0000)knlGS:0000000000000000\n  [32.1605] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  [32.1607] CR2: 00007f0c28e8a3cc CR3: 0000000109942005 CR4:0000000000370ef0\n  [32.1609] Call Trace:\n  [32.1610]  \u003cTASK\u003e\n  [32.1611]  switch_commit_roots+0x82/0x1d0 [btrfs]\n  [32.1615]  btrfs_commit_transaction+0x968/0x1550 [btrfs]\n  [32.1618]  ? btrfs_attach_transaction_barrier+0x23/0x60 [btrfs]\n  [32.1621]  __iterate_supers+0xe8/0x190\n  [32.1622]  ? __pfx_sync_fs_one_sb+0x10/0x10\n  [32.1623]  ksys_sync+0x63/0xb0\n  [32.1624]  __do_sys_sync+0xe/0x20\n  [32.1625]  do_syscall_64+0x73/0x450\n  [32.1626]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n  [32.1627] RIP: 0033:0x7f0c28d05d2b\n  [32.1632] RSP: 002b:00007ffc9d988048 EFLAGS: 00000246 ORIG_RAX:00000000000000a2\n  [32.1634] RAX: ffffffffffffffda RBX: 00007ffc9d988228 RCX:00007f0c28d05d2b\n  [32.1636] RDX: 00007f0c28e02301 RSI: 00007ffc9d989b21 RDI:00007f0c28dba90d\n  [32.1637] RBP: 0000000000000001 R08: 0000000000000001 R09:0000000000000000\n  [32.1639] R10: 0000000000000000 R11: 0000000000000246 R12:000055b96572cb80\n  [32.1641] R13: 000055b96572b19f R14: 00007f0c28dfa434 R15:000055b96572b034\n  [32.1643]  \u003c/TASK\u003e\n  [32.1644] irq event stamp: 0\n  [32.1644] hardirqs last  enabled at (0): [\u003c0000000000000000\u003e] 0x0\n  [32.1646] hardirqs last disabled at (0): [\u003cffffffff81298817\u003e]copy_process+0xb37/0x2260\n  [32.1648] softirqs last  enabled at (0): [\u003cffffffff81298817\u003e]copy_process+0xb37/0x2260\n  [32.1650] softirqs last disabled at (0): [\u003c0000000000000000\u003e] 0x0\n  [32.1652] ---[ end trace 0000000000000000 ]---\n\nFurthermore, this list corruption eventually (when we happen to add a\nnew block group) results in getting the switch_commits and\ndirty_cowonly_roots lists mixed up and attempting to call update_root\non the tree root which can\u0027t be found in the tree root, resulting in a\ntransaction abort:\n\n  [87.8269] BTRFS critical (device nvme1n1): unable to find root key (1 0 0) in tree 1\n  [87.8272] ------------[ cut here ]------------\n  [87.8274] BTRFS: Transaction aborted (error -117)\n  [87.8275] WARNING: fs/btrfs/root-tree.c:153 at 0x0, CPU#4: sync/703\n  [87.8285] CPU: 4 UID: 0 PID: 703 Comm: sync Not tainted 6.18.0 #25 PREEMPT(none)\n  [87.8287] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-4.fc41 0\n---truncated---"
    }
  ],
  "id": "CVE-2026-46251",
  "lastModified": "2026-06-09T20:38:23.397",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-03T18:16:25.603",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/201091da34c4f113af6b4a7407091c39bf29d4ca"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/4eb830847d84276f1c8ea46541cfeeedaba1fb63"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/6e10283b5519d987d880d71bec90cdc7f2ec62b3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/80e1fda9c084dcf54819a12bc7682ec0afd2d8f4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/e3d1fd084319f8f0830b22f014c7af6a96b4497b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.