Linux Kernel up to 6.1.128/6.6.75/6.12.12/6.13.1 am65-cpsw am65_cpsw_nuss_remove_tx_chns Error null pointer dereference

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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.1.128/6.6.75/6.12.12/6.13.1 and classified as critical. This affects the function am65_cpsw_nuss_remove_tx_chns of the component am65-cpsw. The manipulation of the argument Error results in null pointer dereference. This vulnerability is reported as CVE-2025-21799. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.1.128/6.6.75/6.12.12/6.13.1. Affected is the function am65_cpsw_nuss_remove_tx_chns of the component am65-cpsw. The manipulation of the argument error 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: net: ethernet: ti: am65-cpsw: fix freeing IRQ in am65_cpsw_nuss_remove_tx_chns() When getting the IRQ we use k3_udma_glue_tx_get_irq() which returns negative error value on error. So not NULL check is not sufficient to deteremine if IRQ is valid. Check that IRQ is greater then zero to ensure it is valid. There is no issue at probe time but at runtime user can invoke .set_channels which results in the following call chain. am65_cpsw_set_channels() am65_cpsw_nuss_update_tx_rx_chns() am65_cpsw_nuss_remove_tx_chns() am65_cpsw_nuss_init_tx_chns() At this point if am65_cpsw_nuss_init_tx_chns() fails due to k3_udma_glue_tx_get_irq() then tx_chn->irq will be set to a negative value. Then, at subsequent .set_channels with higher channel count we will attempt to free an invalid IRQ in am65_cpsw_nuss_remove_tx_chns() leading to a kernel warning. The issue is present in the original commit that introduced this driver, although there, am65_cpsw_nuss_update_tx_rx_chns() existed as am65_cpsw_nuss_update_tx_chns().

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2025-21799 since 12/29/2024. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 232678 (SUSE SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2025:0847-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.129, 6.6.76, 6.12.13, 6.13.2 or 6.14-rc1 eliminates this vulnerability. Applying the patch aea5cca681d268f794fa2385f9ec26a5cce025cd/88fd5db8c0073bd91d18391feb5741aeb0a2b475/8448c87b3af68bebca21e3136913f7f77e363515/8aae91ae1c65782a169ec070e023d4d269e5d6e6/4395a44acb15850e492dd1de9ec4b6479d96bc80 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 (232678), EUVD (EUVD-2025-5990) and CERT Bund (WID-SEC-2025-0461). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • Dell Secure Connect Gateway

Productinfo

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Vendor

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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: 232678
Nessus Name: SUSE SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2025:0847-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.1.129/6.6.76/6.12.13/6.13.2/6.14-rc1
Patch: aea5cca681d268f794fa2385f9ec26a5cce025cd/88fd5db8c0073bd91d18391feb5741aeb0a2b475/8448c87b3af68bebca21e3136913f7f77e363515/8aae91ae1c65782a169ec070e023d4d269e5d6e6/4395a44acb15850e492dd1de9ec4b6479d96bc80

Timelineinfo

12/29/2024 🔍
02/27/2025 +60 days 🔍
02/27/2025 +0 days 🔍
02/16/2026 +354 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21799 (🔍)
GCVE (CVE): GCVE-0-2025-21799
GCVE (VulDB): GCVE-100-297882
EUVD: 🔍
CERT Bund: WID-SEC-2025-0461 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 02/27/2025 21:28
Updated: 02/16/2026 23:06
Changes: 02/27/2025 21:28 (60), 03/13/2025 19:22 (2), 07/20/2025 15:25 (7), 10/28/2025 23:00 (11), 10/29/2025 07:57 (1), 02/16/2026 23:06 (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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