Service interruption via unreleased station-request buffers
Published Jun 24, 2026 · Updated Jun 24, 2026
Memory leak in the mt76 Wi-Fi driver in Linux Kernel 5.18 through 7.0.9 causes an SKB leak when station setup operations fail. mt76_connac_mcu_alloc_sta_req() allocates the buffer, but error returns from mt76_connac_mcu_sta_wed_update() or mt76_connac_mcu_sta_key_tlv() bypass the send path that normally frees it. Repeated failures consume kernel memory and interrupt service; Ubuntu reports that attackers cannot invoke or influence the required hardware or firmware errors.
Summary
What happened
Memory leak in the mt76 Wi-Fi driver in Linux Kernel 5.18 through 7.0.9 causes an SKB leak when station setup operations fail. mt76_connac_mcu_alloc_sta_req() allocates the buffer, but error returns from mt76_connac_mcu_sta_wed_update() or mt76_connac_mcu_sta_key_tlv() bypass the send path that normally frees it. Repeated failures consume kernel memory and interrupt service; Ubuntu reports that attackers cannot invoke or influence the required hardware or firmware errors.
The record
- CVE
- CVE-2026-53102
- Published
- Jun 24, 2026
- Updated
- Jun 24, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-401
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 24, 2026CVE publishedPublication date reported by the CVE source.
- Jun 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
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Is a vulnerable build present?
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- Affected versionversion=5.18
- Affected versionversion=6683d988089ce0e80bd859a9493333b6b272420e <c41075ce8cf05ed8c0e7b7efef000dce548ffc42
- Affected versionversion=6683d988089ce0e80bd859a9493333b6b272420e <eb466406d2094deefadc2cd6ddb4f6eeb086d1b4
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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Your stack
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