Medium [CVE-2026-68309] fix possible NULL-pointer deref in mt76_connac_mcu_uni_bss_he_tlv
This medium-severity Red Hat Linux advisory covers CVE-2026-68309 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
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Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: connac: fix possible NULL-pointer deref in mt76_connac_mcu_uni_bss_he_tlv() mt76_connac_get_he_phy_cap routine can theoretically return NULL so check cap pointer before dereferencing it.
This vulnerability occurs because the `mt76_connac_get_he_phy_cap` routine can return a NULL value, which is then dereferenced without proper validation. This can lead to a NULL-pointer dereference, potentially causing a system crash and resulting in a Denial of Service (DoS).
This issue affects MediaTek mt76 connac Wi-Fi drivers broadly. mt76_connac_mcu_uni_bss_he_tlv() does not guard NULL from mt76_connac_get_he_phy_cap(). Systems without affected MediaTek Wi-Fi 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.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: kernel-rt.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-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 · medium-confidence parse· fetched 2 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 2 days ago·verify at source
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