CVE-2025-38515
Estado: AnalizadaMedia (4.7)—
In the Linux kernel, the following vulnerability has been resolved:
drm/sched: Increment job count before swapping tail spsc queue
A small race exists between spsc_queue_push and the run-job worker, in which spsc_queue_push may return not-first while the run-job worker has already idled due to the job count being zero. If this race occurs, job scheduling stops, leading to hangs while waiting on the job’s DMA fences.
Seal this race by incrementing the job count before appending to the SPSC queue.
This race was observed on a drm-tip 6.16-rc1 build with the Xe driver in an SVM test case.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 4.7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.15%
- Percentil entre todas las CVEs puntuadas: 4
- 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/549a9c78c3ea6807d0dc4162a4f5ba59f217d5a0
- https://git.kernel.org/stable/c/8af39ec5cf2be522c8eb43a3d8005ed59e4daaee
- https://git.kernel.org/stable/c/c64f5310530baf75328292f9b9f3f2961d185183
- https://git.kernel.org/stable/c/e2d6547dc8b9b332f9bc00875197287a6a4db65a
- https://git.kernel.org/stable/c/e62f51d0ec8a9baf324caf9a564f8e318d36a551
- https://git.kernel.org/stable/c/ef58a95457466849fa7b31fd3953801a5af0f58b
- https://git.kernel.org/stable/c/ef841f8e4e1ff67817ca899bedc5ebb00847c0a7
- https://git.kernel.org/stable/c/f9a4f28a4fc4ee453a92a9abbe36e26224d17749
- 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\ndrm/sched: Increment job count before swapping tail spsc queue\n\nA small race exists between spsc_queue_push and the run-job worker, in\nwhich spsc_queue_push may return not-first while the run-job worker has\nalready idled due to the job count being zero. If this race occurs, job\nscheduling stops, leading to hangs while waiting on the job’s DMA\nfences.\n\nSeal this race by incrementing the job count before appending to the\nSPSC queue.\n\nThis race was observed on a drm-tip 6.16-rc1 build with the Xe driver in\nan SVM test case."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/sched: Incremento del recuento de trabajos antes de intercambiar la cola de cola de spsc. Existe una pequeña competencia entre spsc_queue_push y el trabajador de ejecución de trabajos, en la que spsc_queue_push puede devolver un resultado no-first mientras el trabajador de ejecución de trabajos ya está inactivo debido a que el recuento de trabajos es cero. Si se produce esta competencia, se detiene la programación de trabajos, lo que provoca bloqueos mientras se espera en las barreras DMA del trabajo. Para solucionar esta competencia, incremente el recuento de trabajos antes de agregarlos a la cola de SPSC. Esta competencia se observó en una compilación drm-tip 6.16-rc1 con el controlador Xe en un caso de prueba SVM."
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