Linux Kernel up to 6.1.154/6.6.108/6.12.49/6.16.9 afs afs_put_server 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 was found in Linux Kernel up to 6.1.154/6.6.108/6.12.49/6.16.9. It has been classified as critical. The impacted element is the function afs_put_server of the component afs. Performing a manipulation results in null pointer dereference. This vulnerability is identified as CVE-2025-40010. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.1.154/6.6.108/6.12.49/6.16.9. This affects the function afs_put_server of the component afs. 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. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: afs: Fix potential null pointer dereference in afs_put_server afs_put_server() accessed server->debug_id before the NULL check, which could lead to a null pointer dereference. Move the debug_id assignment, ensuring we never dereference a NULL server pointer.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-40010 since 04/16/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 271660 (Linux Distros Unpatched Vulnerability : CVE-2025-40010), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.155, 6.6.109, 6.12.50 or 6.16.10 eliminates this vulnerability. Applying the patch 7b8381f3c405b864a814d747e526e078c3ef4bc2/cab278cead49a547ac84c3e185f446f381303eae/a13dbc5e20c7284b82afe6f08debdecf51d2ca04/41782c44bb8431c43043129ae42f2ba614938479/9158c6bb245113d4966df9b2ba602197a379412e 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 (271660) and CERT Bund (WID-SEC-2025-2350). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Debian Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

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: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 271660
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-40010

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.155/6.6.109/6.12.50/6.16.10
Patch: 7b8381f3c405b864a814d747e526e078c3ef4bc2/cab278cead49a547ac84c3e185f446f381303eae/a13dbc5e20c7284b82afe6f08debdecf51d2ca04/41782c44bb8431c43043129ae42f2ba614938479/9158c6bb245113d4966df9b2ba602197a379412e

Timelineinfo

04/16/2025 CVE reserved
10/20/2025 +187 days Advisory disclosed
10/20/2025 +0 days VulDB entry created
02/12/2026 +115 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-40010 (🔒)
GCVE (CVE): GCVE-0-2025-40010
GCVE (VulDB): GCVE-100-329061
CERT Bund: WID-SEC-2025-2350 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 10/20/2025 22:19
Updated: 02/12/2026 19:21
Changes: 10/20/2025 22:19 (59), 10/28/2025 01:31 (2), 02/12/2026 19:21 (7)
Complete: 🔍
Cache ID: 216::103

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