CVE-2026-98481

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: port100: reject frames whose declared length exceeds the received data port100_recv_response() passes the URB transfer buffer to port100_rx_frame_is_valid(), which checksums le16_to_cpu(frame->datalen) bytes of frame->data. datalen is a 16-bit field supplied by the device and is never checked against the number of bytes actually received (urb->actual_length), so a device reporting a datalen larger than the received frame makes port100_data_checksum() read out of bounds past the transfer buffer. Reject a response whose declared frame size does not fit the received length before validating it. Found by 0sec (https://0sec.ai) using automated source analysis; the missing bound is evident from source. Compile-tested.

Gravité et risque d'exploitation

CVE-2026-98481 obtient un score CVSS de 0.0/10, soit une gravité non évaluée.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, <=6.12.*, 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06, <3.13, 6.18.55, 0, <db66a30588630c7de30ef033f00daddef69f6ad9, <14b1467cfc6630583650f33538174c5a1ec685ab, <0d482995f0cdd0302450aa300c684c642d8ab31f, 5.10.271, 6.12.112, 6.6.158, <=5.10.*, <=6.6.*, 6.1.189, <035056e07ea65be670284246d9bc62f2f00ff4a3, <=6.18.*, 3.13, 5.15.222, <=7.2.*, <092c6a605cbd6414ef499834c2e0da69c2c3388e, <9e8df087826b9999d1b83b06f5d85675d5a69c9e, 7.2.9, <=*, <=5.15.*, <e4da1452e10c6472a4bac48dc2f6a35fff1fcd69, <144ad477c381e2c592b64898d04ab4ce03b32861, 7.3) est présent sur votre parc.
• Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
• À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
• Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

• https://git.kernel.org/stable/c/0d482995f0cdd0302450aa300c684c642d8ab31f
• https://git.kernel.org/stable/c/9e8df087826b9999d1b83b06f5d85675d5a69c9e
• https://git.kernel.org/stable/c/db66a30588630c7de30ef033f00daddef69f6ad9
• https://git.kernel.org/stable/c/144ad477c381e2c592b64898d04ab4ce03b32861
• https://git.kernel.org/stable/c/e4da1452e10c6472a4bac48dc2f6a35fff1fcd69
• https://git.kernel.org/stable/c/14b1467cfc6630583650f33538174c5a1ec685ab
• https://git.kernel.org/stable/c/035056e07ea65be670284246d9bc62f2f00ff4a3
• https://git.kernel.org/stable/c/092c6a605cbd6414ef499834c2e0da69c2c3388e