Linux Kernel up to 6.16-rc5 atm to_atmarpd null pointer dereference

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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.16-rc5. Affected by this vulnerability is the function to_atmarpd of the component atm. Executing a manipulation can lead to null pointer dereference. This vulnerability is handled as CVE-2025-38460. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.16-rc5. This vulnerability affects the function to_atmarpd of the component atm. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: atm: clip: Fix potential null-ptr-deref in to_atmarpd(). atmarpd is protected by RTNL since commit f3a0592b37b8 ("[ATM]: clip causes unregister hang"). However, it is not enough because to_atmarpd() is called without RTNL, especially clip_neigh_solicit() / neigh_ops->solicit() is unsleepable. Also, there is no RTNL dependency around atmarpd. Let's use a private mutex and RCU to protect access to atmarpd in to_atmarpd().

The advisory is available at git.kernel.org. This vulnerability was named CVE-2025-38460 since 04/16/2025. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 250252 (Linux Distros Unpatched Vulnerability : CVE-2025-38460), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.296, 5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminates this vulnerability. Applying the patch a4c5785feb979cd996a99cfaad8bf353b2e79301/70eac9ba7ce25d99c1d99bbf4ddb058940f631f9/3251ce3979f41bd228f77a7615f9dd616d06a110/ee4d9e4ddf3f9c4ee2ec0a3aad6196ee36d30e57/06935c50cfa3ac57cce80bba67b6d38ec1406e92/36caab990b69ef4eec1d81c52a19f080b7daa059/f58e4270c73e7f086322978d585ea67c8076ce49/706cc36477139c1616a9b2b96610a8bb520b7119 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 (250252), EUVD (EUVD-2025-22681) and CERT Bund (WID-SEC-2025-1653). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • IBM QRadar SIEM
  • SUSE openSUSE
  • RESF Rocky Linux
  • Dell Avamar
  • Open Source Linux Kernel
  • Dell NetWorker
  • Dell Secure Connect Gateway

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 250252
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-38460

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.296/5.10.240/5.15.189/6.1.146/6.6.99/6.12.39/6.15.7/6.16-rc6
Patch: a4c5785feb979cd996a99cfaad8bf353b2e79301/70eac9ba7ce25d99c1d99bbf4ddb058940f631f9/3251ce3979f41bd228f77a7615f9dd616d06a110/ee4d9e4ddf3f9c4ee2ec0a3aad6196ee36d30e57/06935c50cfa3ac57cce80bba67b6d38ec1406e92/36caab990b69ef4eec1d81c52a19f080b7daa059/f58e4270c73e7f086322978d585ea67c8076ce49/706cc36477139c1616a9b2b96610a8bb520b7119

Timelineinfo

04/16/2025 CVE reserved
07/25/2025 +100 days Advisory disclosed
07/25/2025 +0 days VulDB entry created
01/04/2026 +162 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-38460 (🔒)
GCVE (CVE): GCVE-0-2025-38460
GCVE (VulDB): GCVE-100-317746
EUVD: 🔒
CERT Bund: WID-SEC-2025-1653 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 07/25/2025 19:32
Updated: 01/04/2026 00:15
Changes: 07/25/2025 19:32 (60), 07/28/2025 08:10 (1), 07/30/2025 03:38 (1), 08/15/2025 20:25 (2), 08/22/2025 22:33 (7), 09/15/2025 05:37 (1), 09/29/2025 02:26 (1), 11/02/2025 13:58 (1), 12/23/2025 02:41 (10), 01/04/2026 00:15 (1)
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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