CVE-2024-58060

Estado: AnalizadaAlta (7.8)—

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

bpf: Reject struct_ops registration that uses module ptr and the module btf_id is missing

There is a UAF report in the bpf_struct_ops when CONFIG_MODULES=n. In particular, the report is on tcp_congestion_ops that has a "struct module *owner" member.

For struct_ops that has a "struct module *owner" member, it can be extended either by the regular kernel module or by the bpf_struct_ops. bpf_try_module_get() will be used to do the refcounting and different refcount is done based on the owner pointer. When CONFIG_MODULES=n, the btf_id of the "struct module" is missing:

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WARN: resolve_btfids: unresolved symbol module

Thus, the bpf_try_module_get() cannot do the correct refcounting.

Not all subsystem's struct_ops requires the "struct module *owner" member. e.g. the recent sched_ext_ops.

This patch is to disable bpf_struct_ops registration if the struct_ops has the "struct module *" member and the "struct module" btf_id is missing. The btf_type_is_fwd() helper is moved to the btf.h header file for this test.

This has happened since the beginning of bpf_struct_ops which has gone through many changes. The Fixes tag is set to a recent commit that this patch can apply cleanly. Considering CONFIG_MODULES=n is not common and the age of the issue, targeting for bpf-next also.

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: 0.21%
Percentil entre todas las CVEs puntuadas: 10
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 principalT1059 Command and Scripting Interpreterexecution75 %

Vulnerabilidad UAF (CWE-416) en bpf_struct_ops con acceso local (AV:L, PR:L) que permite al atacante con privilegios de usuario elevar permisos y ejecutar código arbitrario cuando CONFIG_MODULES=n por falta de validación de refcounting.

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 Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-416

Referencias

JSON original (NVD)

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject struct_ops registration that uses module ptr and the module btf_id is missing\n\nThere is a UAF report in the bpf_struct_ops when CONFIG_MODULES=n.\nIn particular, the report is on tcp_congestion_ops that has\na \"struct module *owner\" member.\n\nFor struct_ops that has a \"struct module *owner\" member,\nit can be extended either by the regular kernel module or\nby the bpf_struct_ops. bpf_try_module_get() will be used\nto do the refcounting and different refcount is done\nbased on the owner pointer. When CONFIG_MODULES=n,\nthe btf_id of the \"struct module\" is missing:\n\nWARN: resolve_btfids: unresolved symbol module\n\nThus, the bpf_try_module_get() cannot do the correct refcounting.\n\nNot all subsystem's struct_ops requires the \"struct module *owner\" member.\ne.g. the recent sched_ext_ops.\n\nThis patch is to disable bpf_struct_ops registration if\nthe struct_ops has the \"struct module *\" member and the\n\"struct module\" btf_id is missing. The btf_type_is_fwd() helper\nis moved to the btf.h header file for this test.\n\nThis has happened since the beginning of bpf_struct_ops which has gone\nthrough many changes. The Fixes tag is set to a recent commit that this\npatch can apply cleanly. Considering CONFIG_MODULES=n is not\ncommon and the age of the issue, targeting for bpf-next also."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Rechazar el registro de struct_ops que usa el módulo ptr y falta el módulo btf_id Hay un informe UAF en bpf_struct_ops cuando CONFIG_MODULES=n. En particular, el informe está en tcp_congestion_ops que tiene un miembro \"struct module *owner\". Para struct_ops que tiene un miembro \"struct module *owner\", puede extenderse mediante el módulo de kernel regular o mediante bpf_struct_ops. bpf_try_module_get() se usará para hacer el recuento de referencias y se realiza un recuento de referencias diferente según el puntero del propietario. Cuando CONFIG_MODULES=n, falta el btf_id del \"struct module\": WARN: resolve_btfids: módulo de símbolo sin resolver Por lo tanto, bpf_try_module_get() no puede hacer el recuento de referencias correcto. No todos los struct_ops de los subsistemas requieren el miembro \"struct module *owner\", por ejemplo, el reciente sched_ext_ops. Este parche sirve para deshabilitar el registro de bpf_struct_ops si struct_ops tiene el miembro \"struct module *\" y falta el btf_id \"struct module\". El asistente btf_type_is_fwd() se ha movido al archivo de encabezado btf.h para esta prueba. Esto ha sucedido desde el comienzo de bpf_struct_ops, que ha sufrido muchos cambios. La etiqueta Fixes se establece en una confirmación reciente que este parche puede aplicar sin problemas. Teniendo en cuenta que CONFIG_MODULES=n no es común y la antigüedad del problema, también se apunta a bpf-next."
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