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CVE-2026-53009

Estado: ModificadaAlta (7.8)—

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

ice: fix double-free of tx_buf skb

If ice_tso() or ice_tx_csum() fail, the error path in ice_xmit_frame_ring() frees the skb, but the 'first' tx_buf still points to it and is marked as valid (ICE_TX_BUF_SKB). 'next_to_use' remains unchanged, so the potential problem will likely fix itself when the next packet is transmitted and the tx_buf gets overwritten. But if there is no next packet and the interface is brought down instead, ice_clean_tx_ring() -> ice_unmap_and_free_tx_buf() will find the tx_buf and free the skb for the second time.

Leer descripción completaMostrar menos

The fix is to reset the tx_buf type to ICE_TX_BUF_EMPTY in the error path, so that ice_unmap_and_free_tx_buf(). Move the initialization of 'first' up, to ensure it's already valid in case we hit the linearization error path.

The bug was spotted by AI while I had it looking for something else. It also proposed an initial version of the patch.

I reproduced the bug and tested the fix by adding code to inject failures, on a build with KASAN.

I looked for similar bugs in related Intel drivers and did not find any.

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.

Acceso local sin interacción (AV:L, PR:L, UI:N) permite escalada; double-free en kernel causa DoS/crash (T1499.004) y potencial ejecución (CWE-415/416 con C=H, I=H, A=H sugieren corrupción de memoria en modo kernel).

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 ProgramExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (2)

Linux — Linux KernelRedhat — Enterprise Linux

CWE

Referencias

JSON original (NVD)

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