Medium [CVE-2026-68306] fix possible NULL-pointer deref in mt7996_mcu_sta_bfer_eht
This medium-severity Red Hat Linux advisory covers CVE-2026-68306.
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Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: fix possible NULL-pointer deref in mt7996_mcu_sta_bfer_eht() mt76_connac_get_eht_phy_cap routine can theoretically return NULL so check cap pointer before dereferencing it.
A flaw was found in the Linux kernel's Wi-Fi subsystem, specifically within the mt76 driver for MediaTek mt7996 devices. This vulnerability occurs because the `mt76_connac_get_eht_phy_cap` routine can return a NULL pointer, which is not properly checked before being dereferenced.
An attacker could potentially exploit this to cause a system crash, leading to a Denial of Service (DoS). EHT PHY capability pointer is not checked for NULL in mcu_sta_bfer_eht.
Systems without mt7996 hardware are not affected. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-476. Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux for NVIDIA 26; Red Hat OpenShift Container Platform 4 as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 days ago·verify at source
Mitigation checklist
- To mitigate this issue, prevent the mt7996e module from loading. See https://access.redhat.com/solutions/41278 for instructions.
Official advisory · high-confidence parse· fetched 2 days ago·verify at source
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