Bug 2516846 (CVE-2026-74322)

Summary: CVE-2026-74322 kernel: wifi: mt76: mt7996: Fix possible NULL pointer dereference in mt7996_mac_write_txwi_80211()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's mt76 Wi-Fi driver. This vulnerability allows an attacker to trigger an invalid memory access when processing specific Wi-Fi frames. This can lead to a system crash, resulting in a Denial of Service (DoS) for affected systems.
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Description OSIDB Bzimport 2026-08-15 06:36:31 UTC 
In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7996: Fix possible NULL pointer dereference in mt7996_mac_write_txwi_80211()

For injected frames (e.g. via radiotap), mac80211 can pass
info->control.vif = NULL, as explicitly noted in struct ieee80211_tx_info.
Check vif pointer before executing ieee80211_vif_is_mld() in
mt7996_mac_write_txwi_80211 routine in order to avoid a possible NULL
pointer dereference.
Comment 1 Keith Grant 2026-08-20 16:51:42 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081554-CVE-2026-74322-9f3d@gregkh/T