CVE-2026-23453

Estado: AnalizadaAlta (7.5)—

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

net: ti: icssg-prueth: Fix memory leak in XDP_DROP for non-zero-copy mode

Page recycling was removed from the XDP_DROP path in emac_run_xdp() to avoid conflicts with AF_XDP zero-copy mode, which uses xsk_buff_free() instead.

However, this causes a memory leak when running XDP programs that drop packets in non-zero-copy mode (standard page pool mode). The pages are never returned to the page pool, leading to OOM conditions.

Fix this by handling cleanup in the caller, emac_rx_packet(). When emac_run_xdp() returns ICSSG_XDP_CONSUMED for XDP_DROP, the caller now recycles the page back to the page pool. The zero-copy path, emac_rx_packet_zc() already handles cleanup correctly with xsk_buff_free().

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.34%
Percentil entre todas las CVEs puntuadas: 26
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.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access35 %
Impacto principalT1499.004 Application or System Exploitationimpact75 %

Vulnerabilidad de DoS en kernel Linux (AV:N, A:H) explotable remotamente; memory leak en XDP causa OOM, denegando servicio. Confianza baja en explotación porque no hay evidencia de código activo o PoC.

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

Filter Network Traffic Vulnerability Scanning Privileged Account Management Network Segmentation Limit Access to Resource Over Network Application Isolation and Sandboxing

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-401

Referencias

JSON original (NVD)

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          "integrityImpact": "NONE",
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ti: icssg-prueth: Fix memory leak in XDP_DROP for non-zero-copy mode\n\nPage recycling was removed from the XDP_DROP path in emac_run_xdp() to\navoid conflicts with AF_XDP zero-copy mode, which uses xsk_buff_free()\ninstead.\n\nHowever, this causes a memory leak when running XDP programs that drop\npackets in non-zero-copy mode (standard page pool mode). The pages are\nnever returned to the page pool, leading to OOM conditions.\n\nFix this by handling cleanup in the caller, emac_rx_packet().\nWhen emac_run_xdp() returns ICSSG_XDP_CONSUMED for XDP_DROP, the\ncaller now recycles the page back to the page pool. The zero-copy\npath, emac_rx_packet_zc() already handles cleanup correctly with\nxsk_buff_free()."
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      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: ti: icssg-prueth: Corrección de fuga de memoria en XDP_DROP para el modo sin copia cero\n\nEl reciclaje de páginas fue eliminado de la ruta XDP_DROP en emac_run_xdp() para evitar conflictos con el modo de copia cero de AF_XDP, que usa xsk_buff_free() en su lugar.\n\nSin embargo, esto causa una fuga de memoria al ejecutar programas XDP que descartan paquetes en modo sin copia cero (modo de pool de páginas estándar). Las páginas nunca son devueltas al pool de páginas, lo que lleva a condiciones de OOM.\n\nEsto se soluciona manejando la limpieza en la función llamadora, emac_rx_packet(). Cuando emac_run_xdp() devuelve ICSSG_XDP_CONSUMED para XDP_DROP, la función llamadora ahora recicla la página de vuelta al pool de páginas. La ruta de copia cero, emac_rx_packet_zc(), ya maneja la limpieza correctamente con xsk_buff_free()."
    }
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  "lastModified": "2026-07-24T21:10:00.143",
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