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CVE-2025-37838

Estado: ModificadaAlta (7.8)—

In the Linux kernel, the following vulnerability has been resolved:

HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition

In the ssi_protocol_probe() function, &ssi->work is bound with ssip_xmit_work(), In ssip_pn_setup(), the ssip_pn_xmit() function within the ssip_pn_ops structure is capable of starting the work.

If we remove the module which will call ssi_protocol_remove() to make a cleanup, it will free ssi through kfree(ssi), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows:

CPU0 CPU1

Leer descripción completaMostrar menos

Fix it by ensuring that the work is canceled before proceeding with the cleanup in ssi_protocol_remove().

Detalles técnicos trazas, registros y código del informe original
                        | ssip_xmit_work
ssi_protocol_remove     |
kfree(ssi);             |
                        | struct hsi_client *cl = ssi->cl;
                        | // use ssi

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

CWE-416 (use-after-free) en controlador de kernel con AV:L y PR:L permite escalada local. La raza entre kfree() y acceso en ssip_xmit_work facilita ejecución de código con privilegios elevados.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition\n\nIn the ssi_protocol_probe() function, &ssi->work is bound with\nssip_xmit_work(), In ssip_pn_setup(), the ssip_pn_xmit() function\nwithin the ssip_pn_ops structure is capable of starting the\nwork.\n\nIf we remove the module which will call ssi_protocol_remove()\nto make a cleanup, it will free ssi through kfree(ssi),\nwhile the work mentioned above will be used. The sequence\nof operations that may lead to a UAF bug is as follows:\n\nCPU0                                    CPU1\n\n                        | ssip_xmit_work\nssi_protocol_remove     |\nkfree(ssi);             |\n                        | struct hsi_client *cl = ssi->cl;\n                        | // use ssi\n\nFix it by ensuring that the work is canceled before proceeding\nwith the cleanup in ssi_protocol_remove()."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: HSI: ssi_protocol: Se corrige la vulnerabilidad de use-after-free en el controlador ssi_protocol debido a la condición de ejecución en la función ssi_protocol_probe(), &ssi->work está enlazada con ssip_xmit_work(), En ssip_pn_setup(), la función ssip_pn_xmit() dentro de la estructura ssip_pn_ops es capaz de iniciar el trabajo. Si eliminamos el módulo que llamará a ssi_protocol_remove() para hacer una limpieza, liberará ssi a través de kfree(ssi), mientras que el trabajo mencionado anteriormente se utilizará. La secuencia de operaciones que puede llevar a un error de UAF es la siguiente: CPU0 CPU1 | ssip_xmit_work ssi_protocol_remove | kfree(ssi); | | struct hsi_client *cl = ssi->cl; | // use ssi Corríjalo asegurándose de que el trabajo se cancele antes de continuar con la limpieza en ssi_protocol_remove()."
    }
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