CVE-2022-50412

Estado: ModificadaAlta (7.8)—

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

drm: bridge: adv7511: unregister cec i2c device after cec adapter

cec_unregister_adapter() assumes that the underlying adapter ops are callable. For example, if the CEC adapter currently has a valid physical address, then the unregistration procedure will invalidate the physical address by setting it to f.f.f.f. Whence the following kernel oops observed after removing the adv7511 module:

Protect against this scenario by unregistering i2c_cec after unregistering the CEC adapter. Duly disable the CEC clock afterwards too.

Detalles técnicos trazas, registros y código del informe original

    Unable to handle kernel execution of user memory at virtual address 0000000000000000
    Internal error: Oops: 86000004 [#1] PREEMPT_RT SMP
    Call trace:
     0x0
     adv7511_cec_adap_log_addr+0x1ac/0x1c8 [adv7511]
     cec_adap_unconfigure+0x44/0x90 [cec]
     __cec_s_phys_addr.part.0+0x68/0x230 [cec]
     __cec_s_phys_addr+0x40/0x50 [cec]
     cec_unregister_adapter+0xb4/0x118 [cec]
     adv7511_remove+0x60/0x90 [adv7511]
     i2c_device_remove+0x34/0xe0
     device_release_driver_internal+0x114/0x1f0
     driver_detach+0x54/0xe0
     bus_remove_driver+0x60/0xd8
     driver_unregister+0x34/0x60
     i2c_del_driver+0x2c/0x68
     adv7511_exit+0x1c/0x67c [adv7511]
     __arm64_sys_delete_module+0x154/0x288
     invoke_syscall+0x48/0x100
     el0_svc_common.constprop.0+0x48/0xe8
     do_el0_svc+0x28/0x88
     el0_svc+0x1c/0x50
     el0t_64_sync_handler+0xa8/0xb0
     el0t_64_sync+0x15c/0x160
    Code: bad PC value
    ---[ end trace 0000000000000000 ]---

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.17%
Percentil entre todas las CVEs puntuadas: 6
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1499.004 Application or System Exploitationimpact75 %

Vulnerabilidad local (AV:L, PR:L) que causa kernel oops al desregistrar módulo; permite DoS por denegación de servicio sin requiere privilegios adicionales en el kernel.

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

Threat Intelligence Program Filter Network Traffic Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

Mostrar

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: bridge: adv7511: unregister cec i2c device after cec adapter\n\ncec_unregister_adapter() assumes that the underlying adapter ops are\ncallable. For example, if the CEC adapter currently has a valid physical\naddress, then the unregistration procedure will invalidate the physical\naddress by setting it to f.f.f.f. Whence the following kernel oops\nobserved after removing the adv7511 module:\n\n    Unable to handle kernel execution of user memory at virtual address 0000000000000000\n    Internal error: Oops: 86000004 [#1] PREEMPT_RT SMP\n    Call trace:\n     0x0\n     adv7511_cec_adap_log_addr+0x1ac/0x1c8 [adv7511]\n     cec_adap_unconfigure+0x44/0x90 [cec]\n     __cec_s_phys_addr.part.0+0x68/0x230 [cec]\n     __cec_s_phys_addr+0x40/0x50 [cec]\n     cec_unregister_adapter+0xb4/0x118 [cec]\n     adv7511_remove+0x60/0x90 [adv7511]\n     i2c_device_remove+0x34/0xe0\n     device_release_driver_internal+0x114/0x1f0\n     driver_detach+0x54/0xe0\n     bus_remove_driver+0x60/0xd8\n     driver_unregister+0x34/0x60\n     i2c_del_driver+0x2c/0x68\n     adv7511_exit+0x1c/0x67c [adv7511]\n     __arm64_sys_delete_module+0x154/0x288\n     invoke_syscall+0x48/0x100\n     el0_svc_common.constprop.0+0x48/0xe8\n     do_el0_svc+0x28/0x88\n     el0_svc+0x1c/0x50\n     el0t_64_sync_handler+0xa8/0xb0\n     el0t_64_sync+0x15c/0x160\n    Code: bad PC value\n    ---[ end trace 0000000000000000 ]---\n\nProtect against this scenario by unregistering i2c_cec after\nunregistering the CEC adapter. Duly disable the CEC clock afterwards\ntoo."
    }
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  "lastModified": "2026-06-17T05:23:29.510",
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