CVE-2026-43495

CVE-2026-43495 · net: wwan: t7xx: validate port_count against message length in t7xx_port_enum_msg_handler

CVSS 8.8 · Élevée · EPSS 0,3% · Correctif disponible

dpkg-query -W -f='${source:Package} ${binary:Package} ${Version}\n' | awk '$1=="linux"'

curl -fsSL https://patchfirst.dev/check.sh | sh

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

Cette page présente une partie des faits des sources. Consultez les avis liés pour la description complète et les versions concernées.

In the Linux kernel, the following vulnerability has been resolved: net: wwan: t7xx: validate port_count against message length in t7xx_port_enum_msg_handler t7xx_port_enum_msg_handler() uses the modem-supplied port_count field as a loop bound over port_msg->data[] without checking that the message buffer contains sufficient data. A modem sending port_count=65535 in a 12-byte buffer triggers a slab-out-of-bounds read of up to 262140 bytes. Add a sizeof(*port_msg) check before accessing the port message header fields to guard against undersized messages. Add a struct_size() check after extracting port_count and before the loop. In t7xx_parse_host_rt_data(), guard the rt_feature header read with a remaining-buffer check before accessing data_len, validate feat_data_len against the actual remaining buffer to prevent OOB reads and signed integer overflow on offset. Pass msg_len from both call sites: skb->len at the DPMAIF path after skb_pull(), and the validated feat_data_len at the handshake path.

Publication

2026-05-21T12:12:45.988Z

Mise à jour

2026-08-05T12:28:18.825Z

Pile logicielle: system

Vérifiez votre serveur →