CVE-2025-21914

Estado: ModificadaAlta (7.8)—

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

slimbus: messaging: Free transaction ID in delayed interrupt scenario

In case of interrupt delay for any reason, slim_do_transfer() returns timeout error but the transaction ID (TID) is not freed. This results into invalid memory access inside qcom_slim_ngd_rx_msgq_cb() due to invalid TID.

Fix the issue by freeing the TID in slim_do_transfer() before returning timeout error to avoid invalid memory access.

Detalles técnicos trazas, registros y código del informe original

Call trace:
__memcpy_fromio+0x20/0x190
qcom_slim_ngd_rx_msgq_cb+0x130/0x290 [slim_qcom_ngd_ctrl]
vchan_complete+0x2a0/0x4a0
tasklet_action_common+0x274/0x700
tasklet_action+0x28/0x3c
_stext+0x188/0x620
run_ksoftirqd+0x34/0x74
smpboot_thread_fn+0x1d8/0x464
kthread+0x178/0x238
ret_from_fork+0x10/0x20
Code: aa0003e8 91000429 f100044a 3940002b (3800150b)
---[ end trace 0fe00bec2b975c99 ]---
Kernel panic - not syncing: Oops: Fatal exception in interrupt.

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: 0.22%
Percentil entre todas las CVEs puntuadas: 12
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 pánico del kernel por acceso a memoria inválida tras timeout, resultando en DoS; requiere privs locales para desencadenar slim_do_transfer.

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

CWE-787

Referencias

JSON original (NVD)

Mostrar

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nslimbus: messaging: Free transaction ID in delayed interrupt scenario\n\nIn case of interrupt delay for any reason, slim_do_transfer()\nreturns timeout error but the transaction ID (TID) is not freed.\nThis results into invalid memory access inside\nqcom_slim_ngd_rx_msgq_cb() due to invalid TID.\n\nFix the issue by freeing the TID in slim_do_transfer() before\nreturning timeout error to avoid invalid memory access.\n\nCall trace:\n__memcpy_fromio+0x20/0x190\nqcom_slim_ngd_rx_msgq_cb+0x130/0x290 [slim_qcom_ngd_ctrl]\nvchan_complete+0x2a0/0x4a0\ntasklet_action_common+0x274/0x700\ntasklet_action+0x28/0x3c\n_stext+0x188/0x620\nrun_ksoftirqd+0x34/0x74\nsmpboot_thread_fn+0x1d8/0x464\nkthread+0x178/0x238\nret_from_fork+0x10/0x20\nCode: aa0003e8 91000429 f100044a 3940002b (3800150b)\n---[ end trace 0fe00bec2b975c99 ]---\nKernel panic - not syncing: Oops: Fatal exception in interrupt."
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    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: slimbus: mensajería: ID de transacción libre en un escenario de interrupción retrasada. En caso de retraso en la interrupción por cualquier motivo, slim_do_transfer() devuelve un error de tiempo de espera, pero el ID de transacción (TID) no se libera. Esto provoca un acceso no válido a memoria dentro de qcom_slim_ngd_rx_msgq_cb() debido a un TID no válido. Para solucionar el problema, libere el TID en slim_do_transfer() antes de devolver el error de tiempo de espera para evitar accesos no válidos a memoria. Rastreo de llamadas: __memcpy_fromio+0x20/0x190 qcom_slim_ngd_rx_msgq_cb+0x130/0x290 [slim_qcom_ngd_ctrl] vchan_complete+0x2a0/0x4a0 tasklet_action_common+0x274/0x700 tasklet_action+0x28/0x3c _stext+0x188/0x620 run_ksoftirqd+0x34/0x74 smpboot_thread_fn+0x1d8/0x464 kthread+0x178/0x238 ret_from_fork+0x10/0x20 Código: aa0003e8 91000429 f100044a 3940002b (3800150b) ---[ fin de seguimiento 0fe00bec2b975c99 ]--- Pánico del kernel - no sincroniza: Ups: Excepción fatal en la interrupción."
    }
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