CVE-2026-46251

Transaction abort via duplicate dirty-list insertion

Published Jun 3, 2026 · Updated Jun 3, 2026

Denial of service in Linux Kernel allows local users to abort Btrfs transactions on filesystems using EXTENT_TREE_V2. The transaction commit path calls list_add_tail() on block_group_root->dirty_list after normal dirty tracking has already linked the same node, corrupting its prev and next pointers. A transaction that allocates and dirties a block group triggers the duplicate insertion; later list removal mixes root lists and aborts the filesystem transaction.

CVSS severity8.4
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux Kernel allows local users to abort Btrfs transactions on filesystems using EXTENT_TREE_V2. The transaction commit path calls list_add_tail() on block_group_root->dirty_list after normal dirty tracking has already linked the same node, corrupting its prev and next pointers. A transaction that allocates and dirties a block group triggers the duplicate insertion; later list removal mixes root lists and aborts the filesystem transaction.

The record

CVE
CVE-2026-46251
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=14033b08a02916e85ffc5397e4ac15337359f3ae <201091da34c4f113af6b4a7407091c39bf29d4ca
  2. Affected versionversion=14033b08a02916e85ffc5397e4ac15337359f3ae <3a1f4264daed4b419c325a7fe35e756cada3cf82
  3. Affected versionversion=14033b08a02916e85ffc5397e4ac15337359f3ae <4eb830847d84276f1c8ea46541cfeeedaba1fb63
  4. Affected versionversion=14033b08a02916e85ffc5397e4ac15337359f3ae <6e10283b5519d987d880d71bec90cdc7f2ec62b3
  5. Affected versionversion=14033b08a02916e85ffc5397e4ac15337359f3ae <80e1fda9c084dcf54819a12bc7682ec0afd2d8f4
  6. Affected versionversion=14033b08a02916e85ffc5397e4ac15337359f3ae <e3d1fd084319f8f0830b22f014c7af6a96b4497b
  7. Affected versionversion=6.0.19 <6.1
  8. Affected versionversion=6.1
  9. Affected versionversion=dabf41db56f378a360ff0219c467f8dfecda7dd6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=14033b08a02916e85ffc5397e4ac15337359f3ae <201091da34c4f113af6b4a7407091c39bf29d4ca; version=14033b08a02916e85ffc5397e4ac15337359f3ae <3a1f4264daed4b419c325a7fe35e756cada3cf82; version=14033b08a02916e85ffc5397e4ac15337359f3ae <4eb830847d84276f1c8ea46541cfeeedaba1fb63; version=14033b08a02916e85ffc5397e4ac15337359f3ae <6e10283b5519d987d880d71bec90cdc7f2ec62b3; version=14033b08a02916e85ffc5397e4ac15337359f3ae <80e1fda9c084dcf54819a12bc7682ec0afd2d8f4; version=14033b08a02916e85ffc5397e4ac15337359f3ae <e3d1fd084319f8f0830b22f014c7af6a96b4497b; version=6.0.19 <6.1; version=6.1; version=dabf41db56f378a360ff0219c467f8dfecda7dd6

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
8.4kernel.orgCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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