CVE-2025-38539
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
tracing: Add down_write(trace_event_sem) when adding trace event
When a module is loaded, it adds trace events defined by the module. It may also need to modify the modules trace printk formats to replace enum names with their values.
If two modules are loaded at the same time, the adding of the event to the ftrace_events list can corrupt the walking of the list in the code that is modifying the printk format strings and crash the kernel.
The addition of the event should take the trace_event_sem for write while it adds the new event.
Leer descripción completaMostrar menos
Also add a lockdep_assert_held() on that semaphore in __trace_add_event_dirs() as it iterates the list.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
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: 5/10/2026
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).
Tecnologías afectadas (2)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/33e20747b47ddc03569b6bc27a2d6894c1428182
- https://git.kernel.org/stable/c/6bc94f20a4c304997288f9a45278c9d0c06987d3
- https://git.kernel.org/stable/c/70fecd519caad0c1741c3379d5348c9000a5b29d
- https://git.kernel.org/stable/c/7803b28c9aa8d8bd4e19ebcf5f0db9612b0f333b
- https://git.kernel.org/stable/c/b5e8acc14dcb314a9b61ff19dcd9fdd0d88f70df
- https://git.kernel.org/stable/c/ca60064ea03f14e06c763de018403cb56ba3207d
- https://git.kernel.org/stable/c/db45632479ceecb669612ed8dbce927e3c6279fc
- https://git.kernel.org/stable/c/e70f5ee4c8824736332351b703c46f9469ed7f6c
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Add down_write(trace_event_sem) when adding trace event\n\nWhen a module is loaded, it adds trace events defined by the module. It\nmay also need to modify the modules trace printk formats to replace enum\nnames with their values.\n\nIf two modules are loaded at the same time, the adding of the event to the\nftrace_events list can corrupt the walking of the list in the code that is\nmodifying the printk format strings and crash the kernel.\n\nThe addition of the event should take the trace_event_sem for write while\nit adds the new event.\n\nAlso add a lockdep_assert_held() on that semaphore in\n__trace_add_event_dirs() as it iterates the list."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rastreo: Agregar down_write(trace_event_sem) al agregar un evento de rastreo Cuando se carga un módulo, agrega eventos de rastreo definidos por el módulo. También puede necesitar modificar los formatos printk de rastreo de los módulos para reemplazar los nombres de enumeración con sus valores. Si se cargan dos módulos al mismo tiempo, agregar el evento a la lista ftrace_events puede corromper el recorrido de la lista en el código que modifica las cadenas de formato printk y bloquear el kernel. La adición del evento debe tomar trace_event_sem para escritura mientras agrega el nuevo evento. También agregue un lockdep_assert_held() en ese semáforo en __trace_add_event_dirs() mientras itera la lista."
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