CVE-2025-37927

Estado: AnalizadaAlta (7.8)—

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

iommu/amd: Fix potential buffer overflow in parse_ivrs_acpihid

There is a string parsing logic error which can lead to an overflow of hid or uid buffers. Comparing ACPIID_LEN against a total string length doesn't take into account the lengths of individual hid and uid buffers so the check is insufficient in some cases. For example if the length of hid string is 4 and the length of the uid string is 260, the length of str will be equal to ACPIID_LEN + 1 but uid string will overflow uid buffer which size is 256.

The same applies to the hid string with length 13 and uid string with length 250.

Leer descripción completaMostrar menos

Check the length of hid and uid strings separately to prevent buffer overflow.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

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: 0.28%
Percentil entre todas las CVEs puntuadas: 19
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 principalT1059 Command and Scripting Interpreterexecution75 %

Buffer overflow en kernel (CWE-787) con acceso local (AV:L) y privilegios limitados (PR:L) sin interacción. Permite ejecución de código y escalada de privilegios.

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 Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (2)

Debian — Debian Linux 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\niommu/amd: Fix potential buffer overflow in parse_ivrs_acpihid\n\nThere is a string parsing logic error which can lead to an overflow of hid\nor uid buffers. Comparing ACPIID_LEN against a total string length doesn't\ntake into account the lengths of individual hid and uid buffers so the\ncheck is insufficient in some cases. For example if the length of hid\nstring is 4 and the length of the uid string is 260, the length of str\nwill be equal to ACPIID_LEN + 1 but uid string will overflow uid buffer\nwhich size is 256.\n\nThe same applies to the hid string with length 13 and uid string with\nlength 250.\n\nCheck the length of hid and uid strings separately to prevent\nbuffer overflow.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iommu/amd: Arreglar desbordamiento de búfer potencial en parse_ivrs_acpihid Hay un error de lógica de análisis de cadenas que puede provocar un desbordamiento de los búferes hid o uid. La comparación de ACPIID_LEN con la longitud total de una cadena no tiene en cuenta las longitudes de los búferes hid y uid individuales, por lo que la comprobación es insuficiente en algunos casos. Por ejemplo, si la longitud de la cadena hid es 4 y la longitud de la cadena uid es 260, la longitud de str será igual a ACPIID_LEN + 1, pero la cadena uid desbordará el búfer uid, cuyo tamaño es 256. Lo mismo se aplica a la cadena hid con una longitud de 13 y a la cadena uid con una longitud de 250. Compruebe la longitud de las cadenas hid y uid por separado para evitar el desbordamiento del búfer. Encontrado por el Centro de verificación de Linux (linuxtesting.org) con SVACE."
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