CVE-2023-53493

Estado: ModificadaAlta (7.8)—

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

accel/qaic: tighten bounds checking in decode_message()

Copy the bounds checking from encode_message() to decode_message().

This patch addresses the following concerns. Ensure that there is enough space for at least one header so that we don't have a negative size later.

Ensure that we have enough space to read the next header from the msg->data.

Check that the trans_hdr->len is not below the minimum size:

This minimum check ensures that we don't corrupt memory in decode_passthrough() when we do.

And finally, use size_add() to prevent an integer overflow:

Detalles técnicos trazas, registros y código del informe original

	if (msg_hdr_len < sizeof(*trans_hdr))

	if (msg_len > msg_hdr_len - sizeof(*trans_hdr))
		return -EINVAL;

	if (hdr_len < sizeof(*trans_hdr))

	memcpy(out_trans->data, in_trans->data, len - sizeof(in_trans->hdr));

	if (size_add(msg_len, hdr_len) > msg_hdr_len)

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: 0.15%
Percentil entre todas las CVEs puntuadas: 4
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 escalation75 %
Impacto principalT1059 Command and Scripting Interpreterexecution65 %
Impacto secundarioT1499.004 Application or System Exploitationimpact50 %
Impacto secundarioT1565.001 Stored Data Manipulationimpact60 %

AV:L/PR:L/UI:N permite escalada local. Los desbordamientos (memcpy, integer overflow) pueden causar ejecución de código, corrupción de datos o DoS en el kernel de Linux.

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 Restrict File and Directory Permissions Privileged Account Management Remote Data Storage

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

Mostrar

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