CVE-2026-43495

216.73.217.22

· Published 21/05/2026 13:16 · Modified 21/05/2026 13:16

Labels: CVE-2026-43495 2026-05-21 416baaa9-dc9f-4396-8d5f-8c081fb06d67 CVE-2026-43495

Essential information

Published: 21/05/2026 13:16
Modified: 21/05/2026 13:16
Author: —
Creator: —
CVSS: 8.8 HIGH (v3.1)
CISA KEV: No
CWE: —
CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS metrics

Description

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.

NVD status

Status: Awaiting Analysis — CVE has been recently published to the CVE List and has been received by the NVD.
Source: nist-nvd-api
NVD: View on NVD

Affected products (CPE)

Product	CPE
linux / linux kernel	`cpe:2.3:a:linux:linux_kernel::::::::`