1. Home
  2. Vulnerabilities
  3. CVE-2025-21799
5.5
MEDIUM CVSS 3.1
CVE-2025-21799
net: ethernet: ti: am65-cpsw: fix freeing IRQ in am65_cpsw_nuss_remove_tx_chns()
Description

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().

INFO

Published Date :

Feb. 27, 2025, 8:16 p.m.

Last Modified :

Nov. 3, 2025, 9:19 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2025-21799 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
Solution
Update the Linux kernel to a version that includes the fix for IRQ handling.
  • Update the Linux kernel to the corrected version.
  • Apply the patch for am65_cpsw_nuss_remove_tx_chns.
  • Ensure IRQ values are validated before freeing.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-21799.

URL Resource
https://git.kernel.org/stable/c/321990fdf4f1bb64e818c7140688bf33d129e48d Patch
https://git.kernel.org/stable/c/4395a44acb15850e492dd1de9ec4b6479d96bc80 Patch
https://git.kernel.org/stable/c/8448c87b3af68bebca21e3136913f7f77e363515 Patch
https://git.kernel.org/stable/c/88fd5db8c0073bd91d18391feb5741aeb0a2b475 Patch
https://git.kernel.org/stable/c/8aae91ae1c65782a169ec070e023d4d269e5d6e6 Patch
https://git.kernel.org/stable/c/aea5cca681d268f794fa2385f9ec26a5cce025cd Patch
https://git.kernel.org/stable/c/ed8c0300f302338c36edb06bca99051e5be6fb2f Patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-21799 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-21799 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-21799 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-21799 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 03, 2025

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 03, 2025

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
  • Initial Analysis by [email protected]

    Oct. 28, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-476
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.13.2 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.76 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.13 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.179 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.129 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.7 up to (excluding) 5.10.235
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/321990fdf4f1bb64e818c7140688bf33d129e48d Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/4395a44acb15850e492dd1de9ec4b6479d96bc80 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/8448c87b3af68bebca21e3136913f7f77e363515 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/88fd5db8c0073bd91d18391feb5741aeb0a2b475 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/8aae91ae1c65782a169ec070e023d4d269e5d6e6 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/aea5cca681d268f794fa2385f9ec26a5cce025cd Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/ed8c0300f302338c36edb06bca99051e5be6fb2f Types: Patch
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Mar. 13, 2025

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/321990fdf4f1bb64e818c7140688bf33d129e48d
    Added Reference https://git.kernel.org/stable/c/ed8c0300f302338c36edb06bca99051e5be6fb2f
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 27, 2025

    Action Type Old Value New Value
    Added Description 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().
    Added Reference https://git.kernel.org/stable/c/4395a44acb15850e492dd1de9ec4b6479d96bc80
    Added Reference https://git.kernel.org/stable/c/8448c87b3af68bebca21e3136913f7f77e363515
    Added Reference https://git.kernel.org/stable/c/88fd5db8c0073bd91d18391feb5741aeb0a2b475
    Added Reference https://git.kernel.org/stable/c/8aae91ae1c65782a169ec070e023d4d269e5d6e6
    Added Reference https://git.kernel.org/stable/c/aea5cca681d268f794fa2385f9ec26a5cce025cd
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact