CVE-2026-46251

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-06-03. a secondary CVSS source baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.4Exploit: NoneExposed: 0

A fix is available — apply it.

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] [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] [32.1644] irq event stamp: 0 [32.1644] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [32.1646] hardirqs last disabled at (0): []copy_process+0xb37/0x2260 [32.1648] softirqs last enabled at (0): []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---

CVSS v3
8.4
EG Score
8.4(medium)
EPSS
3.1%
KEV
Not listed

Published

June 3, 2026

Last Modified

June 9, 2026

Advisory Details (6)

Auto-updated Jun 5, 2026
No patch confirmed yet.
generic

btrfs: fix block_group_tree dirty_list corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e3d1fd084319f8f0830b22f014c7af6a96b4497b
generic

btrfs: fix block_group_tree dirty_list corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/80e1fda9c084dcf54819a12bc7682ec0afd2d8f4
generic

btrfs: fix block_group_tree dirty_list corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6e10283b5519d987d880d71bec90cdc7f2ec62b3
generic

btrfs: fix block_group_tree dirty_list corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4eb830847d84276f1c8ea46541cfeeedaba1fb63
generic

btrfs: fix block_group_tree dirty_list corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3a1f4264daed4b419c325a7fe35e756cada3cf82
generic

btrfs: fix block_group_tree dirty_list corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/201091da34c4f113af6b4a7407091c39bf29d4ca

Vendor Advisories for CVE-2026-46251(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-6.8 (6.8.0-134.134) @ noble2026-07-12ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1057.58~22.04.1) @ jammy2026-07-12ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-07-12ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1029.30) @ noble2026-07-12ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-07-12ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-07-12ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-07-12ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-07-12ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(8)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 18× in last 7d / 106× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 162 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-14 15:15 UTCEG score recompute
  3. 2026-07-14 15:15 UTCGHSA enrichment
  4. 2026-07-14 03:30 UTCEG score recompute
  5. 2026-07-14 03:30 UTCGHSA enrichment
  6. 2026-07-13 22:30 UTCEPSS rescore
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-12 05:46 UTCEPSS rescore
  9. 2026-07-12 00:29 UTCEG score recompute
  10. 2026-07-12 00:29 UTCVendor advisory
  11. 2026-07-12 00:29 UTCGHSA enrichment
  12. 2026-07-11 12:41 UTCEG score recompute
  13. 2026-07-11 12:41 UTCVendor advisory
  14. 2026-07-11 12:41 UTCGHSA enrichment
  15. 2026-07-11 08:27 UTCEPSS rescore
  16. 2026-07-09 19:10 UTCEPSS rescore
  17. 2026-07-09 06:49 UTCEG score recompute
  18. 2026-07-09 06:49 UTCGHSA enrichment
  19. 2026-07-08 16:26 UTCEG score recompute
  20. 2026-07-08 16:26 UTCGHSA enrichment
  21. 2026-07-08 15:16 UTCEPSS rescore
  22. 2026-07-07 13:46 UTCEPSS rescore
  23. 2026-07-06 02:23 UTCEPSS rescore
  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-03 19:48 UTCEG score recompute
Show 75 more
  1. 2026-07-03 19:48 UTCVendor advisory
  2. 2026-07-03 19:48 UTCGHSA enrichment
  3. 2026-07-02 21:19 UTCEG score recompute
  4. 2026-07-02 21:19 UTCVendor advisory
  5. 2026-07-02 21:18 UTCGHSA enrichment
  6. 2026-07-02 09:32 UTCEG score recompute
  7. 2026-07-02 09:32 UTCVendor advisory
  8. 2026-07-02 09:32 UTCGHSA enrichment
  9. 2026-07-01 21:46 UTCEG score recompute
  10. 2026-07-01 21:46 UTCVendor advisory
  11. 2026-07-01 21:46 UTCGHSA enrichment
  12. 2026-07-01 15:07 UTCEPSS rescore
  13. 2026-07-01 09:55 UTCEG score recompute
  14. 2026-07-01 09:55 UTCGHSA enrichment
  15. 2026-06-30 23:22 UTCEPSS rescore
  16. 2026-06-30 22:10 UTCEG score recompute
  17. 2026-06-30 22:10 UTCGHSA enrichment
  18. 2026-06-30 01:36 UTCEG score recompute
  19. 2026-06-30 01:36 UTCGHSA enrichment
  20. 2026-06-29 14:06 UTCEPSS rescore
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-29 13:51 UTCEG score recompute
  23. 2026-06-29 13:51 UTCGHSA enrichment
  24. 2026-06-29 02:06 UTCEG score recompute
  25. 2026-06-29 02:06 UTCGHSA enrichment
  26. 2026-06-28 14:20 UTCEG score recompute
  27. 2026-06-28 14:20 UTCGHSA enrichment
  28. 2026-06-28 14:07 UTCEPSS rescore
  29. 2026-06-28 04:56 UTCEPSS rescore
  30. 2026-06-28 04:56 UTCEPSS rescore
  31. 2026-06-28 02:35 UTCEG score recompute
  32. 2026-06-28 02:35 UTCGHSA enrichment
  33. 2026-06-27 14:46 UTCEG score recompute
  34. 2026-06-27 14:46 UTCGHSA enrichment
  35. 2026-06-27 03:08 UTCEPSS rescore
  36. 2026-06-27 03:01 UTCEG score recompute
  37. 2026-06-27 03:00 UTCGHSA enrichment
  38. 2026-06-26 15:14 UTCEG score recompute
  39. 2026-06-26 15:13 UTCGHSA enrichment
  40. 2026-06-25 22:24 UTCEG score recompute
  41. 2026-06-25 22:24 UTCGHSA enrichment
  42. 2026-06-25 13:49 UTCEPSS rescore
  43. 2026-06-25 10:37 UTCEG score recompute
  44. 2026-06-25 10:36 UTCGHSA enrichment
  45. 2026-06-24 22:21 UTCEG score recompute
  46. 2026-06-24 22:21 UTCGHSA enrichment
  47. 2026-06-24 14:05 UTCEPSS rescore
  48. 2026-06-24 09:22 UTCEG score recompute
  49. 2026-06-24 09:22 UTCGHSA enrichment
  50. 2026-06-23 21:33 UTCEPSS rescore
  51. 2026-06-23 21:33 UTCEPSS rescore
  52. 2026-06-23 19:06 UTCEG score recompute
  53. 2026-06-23 19:06 UTCGHSA enrichment
  54. 2026-06-22 14:25 UTCEPSS rescore
  55. 2026-06-22 14:25 UTCEPSS rescore
  56. 2026-06-21 14:56 UTCEPSS rescore
  57. 2026-06-21 14:56 UTCEPSS rescore
  58. 2026-06-20 12:44 UTCEG score recompute
  59. 2026-06-20 12:44 UTCGHSA enrichment
  60. 2026-06-19 20:37 UTCEG score recompute
  61. 2026-06-19 20:37 UTCGHSA enrichment
  62. 2026-06-19 19:26 UTCEPSS rescore
  63. 2026-06-19 19:26 UTCEPSS rescore
  64. 2026-06-19 04:29 UTCEG score recompute
  65. 2026-06-19 04:29 UTCGHSA enrichment
  66. 2026-06-18 17:52 UTCEPSS rescore
  67. 2026-06-18 17:52 UTCEPSS rescore
  68. 2026-06-18 16:32 UTCEG score recompute
  69. 2026-06-18 16:32 UTCGHSA enrichment
  70. 2026-06-18 03:13 UTCEG score recompute
  71. 2026-06-18 03:12 UTCGHSA enrichment
  72. 2026-06-17 17:53 UTCEPSS rescore
  73. 2026-06-17 15:22 UTCEG score recompute
  74. 2026-06-17 15:22 UTCGHSA enrichment
  75. 2026-06-17 03:35 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-46251?
CVE-2026-46251 is a high vulnerability published on June 3, 2026. In the Linux kernel, the following vulnerability has been resolved: btrfs: fix blockgrouptree dirty_list corruption When the incompat flag EXTENTTREEV2 is set, we unconditionally add the block group tree to the switch_commits list before calling switchcommitroots, as we do for the tree root and the…
When was CVE-2026-46251 disclosed?
CVE-2026-46251 was first published in the National Vulnerability Database on June 3, 2026, with the most recent update on June 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46251 actively exploited?
CVE-2026-46251 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46251?
CVE-2026-46251 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-46251?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46251, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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