Linux Kernel up to 6.12.65/6.18.5/6.19-rc4 btrfs_evict_inode null pointer dereference

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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.12.65/6.18.5/6.19-rc4. The affected element is the function btrfs_evict_inode. The manipulation results in null pointer dereference. This vulnerability is reported as CVE-2025-71184. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.12.65/6.18.5/6.19-rc4. Affected is the function btrfs_evict_inode. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix NULL dereference on root when tracing inode eviction When evicting an inode the first thing we do is to setup tracing for it, which implies fetching the root's id. But in btrfs_evict_inode() the root might be NULL, as implied in the next check that we do in btrfs_evict_inode(). Hence, we either should set the ->root_objectid to 0 in case the root is NULL, or we move tracing setup after checking that the root is not NULL. Setting the rootid to 0 at least gives us the possibility to trace this call even in the case when the root is NULL, so that's the solution taken here.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2025-71184 since 01/31/2026. The exploitability is told to be difficult. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 297464 (Linux Distros Unpatched Vulnerability : CVE-2025-71184), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.66, 6.18.6 or 6.19-rc5 eliminates this vulnerability. Applying the patch 582ba48e4a4c06fef6bdcf4e57b7b9af660bbd0c/99e057f3d3ef24b99a7b1d84e01dd1bd890098da/f157dd661339fc6f5f2b574fe2429c43bd309534 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (297464), EUVD (EUVD-2025-206591) and CERT Bund (WID-SEC-2026-0280). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Open Source Linux Kernel

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 297464
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-71184

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.66/6.18.6/6.19-rc5
Patch: 582ba48e4a4c06fef6bdcf4e57b7b9af660bbd0c/99e057f3d3ef24b99a7b1d84e01dd1bd890098da/f157dd661339fc6f5f2b574fe2429c43bd309534

Timelineinfo

01/31/2026 Advisory disclosed
01/31/2026 +0 days CVE reserved
01/31/2026 +0 days VulDB entry created
03/26/2026 +54 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-71184 (🔒)
GCVE (CVE): GCVE-0-2025-71184
GCVE (VulDB): GCVE-100-343602
EUVD: 🔒
CERT Bund: WID-SEC-2026-0280 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 01/31/2026 15:18
Updated: 03/26/2026 01:17
Changes: 01/31/2026 15:18 (58), 02/01/2026 03:33 (1), 02/01/2026 07:45 (2), 02/02/2026 16:08 (7), 03/25/2026 12:34 (1), 03/26/2026 01:17 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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