Linux Kernel up to 7.0.9 wifi mt76_connac_mcu_alloc_sta_req memory leak

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 7.0.9. Affected is the function mt76_connac_mcu_alloc_sta_req of the component wifi. Such manipulation leads to memory leak. This vulnerability is traded as CVE-2026-53102. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 7.0.9. Affected by this issue is the function mt76_connac_mcu_alloc_sta_req of the component wifi. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req() mt76_connac_mcu_alloc_sta_req() allocates an skb which is expected to be freed eventually by mt76_mcu_skb_send_msg(). However, currently if an intermediate function fails before sending, the allocated skb is leaked. Specifically, mt76_connac_mcu_sta_wed_update() and mt76_connac_mcu_sta_key_tlv() may fail, leading to an immediate memory leak in the error path. Fix this by explicitly freeing the skb in these error paths. Commit 7c0f63fe37a5 ("wifi: mt76: mt7996: fix memory leak on mt7996_mcu_sta_key_tlv error") made a similar change. Compile tested only. Issue found using a prototype static analysis tool and code review.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-53102 since 06/09/2026. Technical details are known, but there is no available exploit.

Upgrading to version 7.0.10 eliminates this vulnerability. Applying the patch eb466406d2094deefadc2cd6ddb4f6eeb086d1b4/c41075ce8cf05ed8c0e7b7efef000dce548ffc42 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.0.7
• 7.0.8
• 7.0.9

License

• open-source

Website

• Vendor: https://www.kernel.org/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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