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CVE-2026-64037

kernel: wifi: iwlwifi: mld: fix TSO segmentation explosion when AMSDU is disabled

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Severity

Important

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · July 19, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's iwlwifi MLD driver. When the Aggregated MAC Service Data Unit (AMSDU) feature is disabled, the driver incorrectly processes Transmit Segmentation Offload (TSO) requests. This can lead to a flood of micro-frames on the transmit ring, resulting in memory corruption and a use-after-free vulnerability. Exploitation of this flaw could allow an attacker to cause system instability or potentially execute arbitrary code.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-476 · NULL Pointer Dereference