CVE-2025-21799

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-21799
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().

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link 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
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

28 Oct 2025, 20:37

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/321990fdf4f1bb64e818c7140688bf33d129e48d - () https://git.kernel.org/stable/c/321990fdf4f1bb64e818c7140688bf33d129e48d - Patch
References () https://git.kernel.org/stable/c/4395a44acb15850e492dd1de9ec4b6479d96bc80 - () https://git.kernel.org/stable/c/4395a44acb15850e492dd1de9ec4b6479d96bc80 - Patch
References () https://git.kernel.org/stable/c/8448c87b3af68bebca21e3136913f7f77e363515 - () https://git.kernel.org/stable/c/8448c87b3af68bebca21e3136913f7f77e363515 - Patch
References () https://git.kernel.org/stable/c/88fd5db8c0073bd91d18391feb5741aeb0a2b475 - () https://git.kernel.org/stable/c/88fd5db8c0073bd91d18391feb5741aeb0a2b475 - Patch
References () https://git.kernel.org/stable/c/8aae91ae1c65782a169ec070e023d4d269e5d6e6 - () https://git.kernel.org/stable/c/8aae91ae1c65782a169ec070e023d4d269e5d6e6 - Patch
References () https://git.kernel.org/stable/c/aea5cca681d268f794fa2385f9ec26a5cce025cd - () https://git.kernel.org/stable/c/aea5cca681d268f794fa2385f9ec26a5cce025cd - Patch
References () https://git.kernel.org/stable/c/ed8c0300f302338c36edb06bca99051e5be6fb2f - () https://git.kernel.org/stable/c/ed8c0300f302338c36edb06bca99051e5be6fb2f - Patch
CWE CWE-476
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

13 Mar 2025, 13:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/321990fdf4f1bb64e818c7140688bf33d129e48d -
  • () https://git.kernel.org/stable/c/ed8c0300f302338c36edb06bca99051e5be6fb2f -
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: ethernet: ti: am65-cpsw: arreglo de liberación de IRQ en am65_cpsw_nuss_remove_tx_chns() Al obtener la IRQ, usamos k3_udma_glue_tx_get_irq() que devuelve un valor de error negativo en caso de error. Por lo tanto, la comprobación de que no sea NULL no es suficiente para determinar si la IRQ es válida. Compruebe que la IRQ sea mayor que cero para asegurarse de que sea válida. No hay ningún problema en el momento de la prueba, pero en el momento de la ejecución, el usuario puede invocar .set_channels, lo que da como resultado la siguiente cadena de llamadas. am65_cpsw_set_channels() am65_cpsw_nuss_update_tx_rx_chns() am65_cpsw_nuss_remove_tx_chns() am65_cpsw_nuss_init_tx_chns() En este punto, si am65_cpsw_nuss_init_tx_chns() falla debido a k3_udma_glue_tx_get_irq(), tx_chn->irq se establecerá en un valor negativo. Luego, en los .set_channels posteriores con un mayor conteo de canales, intentaremos liberar una IRQ no válida en am65_cpsw_nuss_remove_tx_chns(), lo que generará una advertencia del kernel. El problema está presente en el commit original que introdujo este controlador, aunque allí, am65_cpsw_nuss_update_tx_rx_chns() existía como am65_cpsw_nuss_update_tx_chns().

27 Feb 2025, 20:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-27 20:16

Updated : 2025-10-28 20:37

NVD link : CVE-2025-21799

Mitre link : CVE-2025-21799

CVE.ORG link : CVE-2025-21799

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference