Linux Kernel up to 6.12.10 get_canonical_dev_path null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel up to 6.12.10. This vulnerability affects the function get_canonical_dev_path. The manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2025-21679. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 6.12.10. Affected is the function get_canonical_dev_path. 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: add the missing error handling inside get_canonical_dev_path Inside function get_canonical_dev_path(), we call d_path() to get the final device path. But d_path() can return error, and in that case the next strscpy() call will trigger an invalid memory access. Add back the missing error handling for d_path().

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-21679 since 12/29/2024. There are known technical details, but no exploit is available.

Upgrading to version 6.12.11 eliminates this vulnerability. Applying the patch d0fb5741932b831eded49bfaaf33353e96200d6d/fe4de594f7a2e9bc49407de60fbd20809fad4192 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 vulnerability database at CERT Bund (WID-SEC-2025-0232). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • RESF Rocky Linux
  • Dell NetWorker
  • Dell Avamar
  • Dell PowerProtect Data Domain
  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.12.11
Patch: d0fb5741932b831eded49bfaaf33353e96200d6d/fe4de594f7a2e9bc49407de60fbd20809fad4192

Timelineinfo

12/29/2024 🔍
01/31/2025 +33 days 🔍
01/31/2025 +0 days 🔍
02/17/2026 +382 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21679 (🔍)
GCVE (CVE): GCVE-0-2025-21679
GCVE (VulDB): GCVE-100-294264
CERT Bund: WID-SEC-2025-0232 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 01/31/2025 13:51
Updated: 02/17/2026 04:51
Changes: 01/31/2025 13:51 (22), 01/31/2025 13:54 (36), 10/15/2025 19:07 (11), 02/17/2026 04:51 (7)
Complete: 🔍
Committer: mitr
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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