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CVE-2026-52976

Estado: ModificadaAlta (7.8)—

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

drm/xe: Fix error cleanup in xe_exec_queue_create_ioctl()

Two error handling issues exist in xe_exec_queue_create_ioctl():

(cherry picked from commit 37c831f401746a45d510b312b0ed7a77b1e06ec8)

Detalles técnicos trazas, registros y código del informe original
1. When xe_hw_engine_group_add_exec_queue() fails, the error path jumps
   to put_exec_queue which skips xe_exec_queue_kill(). If the VM is in
   preempt fence mode, xe_vm_add_compute_exec_queue() has already added
   the queue to the VM's compute exec queue list. Skipping the kill
   leaves the queue on that list, leading to a dangling pointer after
   the queue is freed.

2. When xa_alloc() fails after xe_hw_engine_group_add_exec_queue() has
   succeeded, the error path does not call
   xe_hw_engine_group_del_exec_queue() to remove the queue from the hw
   engine group list. The queue is then freed while still linked into
   the hw engine group, causing a use-after-free.

Fix both by:
- Changing the xe_hw_engine_group_add_exec_queue() failure path to jump
  to kill_exec_queue so that xe_exec_queue_kill() properly removes the
  queue from the VM's compute list.
- Adding a del_hw_engine_group label before kill_exec_queue for the
  xa_alloc() failure path, which removes the queue from the hw engine
  group before proceeding with the rest of the cleanup.

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.

Vulnerabilidad local (AV:L, PR:L) sin interacción del usuario en el kernel Linux que permite escalada de privilegios mediante uso después de liberación (CWE-416). El atacante con acceso local puede explotar el error de limpieza en xe_exec_queue_create_ioctl() causando un dangling pointer que lleva a

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 InstallationFilter Network Traffic

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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