In the Linux kernel, the following vulnerability has been resolved: mailbox: mtk-adsp: fix UAF during device teardown When the SOF audio driver… (CVE-2026-72486)
A use-after-free (UAF) vulnerability in the Linux kernel's mailbox driver for the MediaTek ADSP (mtk-adsp) was resolved. The issue occurs during device teardown when the SOF audio driver fails to initialize, leading to a freed snd_sof_dev object still being accessed by a mailbox client callback. This can cause a kernel crash due to accessing freed memory. The fix involves properly disabling IRQs during shutdown and masking IRQs between probe and client binding to prevent late interrupts from triggering the UAF.
AI Analysis
Technical Summary
CVE-2026-72486 describes a use-after-free vulnerability in the Linux kernel mailbox driver for MediaTek ADSP (mtk-adsp). When the SOF audio driver fails to initialize, its device resource unwind frees the snd_sof_dev object that the mailbox client accesses via a callback. The mailbox shutdown clears command registers but leaves the IRQ line unmasked, allowing a late interrupt to queue a handler that accesses freed memory, causing a kernel crash detected by KASAN. The fix disables IRQs during shutdown (waiting for in-flight interrupts) and requests the IRQ with IRQF_NO_AUTOEN to keep it masked until the client binds, preventing early or late interrupts from causing use-after-free conditions.
Potential Impact
This vulnerability can cause a kernel crash (use-after-free) in affected Linux kernel versions running the SOF audio driver with MediaTek ADSP mailbox support. The crash occurs when interrupts access freed memory after a failed driver probe, potentially leading to denial of service. There is no indication of privilege escalation or code execution from the provided data.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to properly disable IRQs during device teardown and mask IRQ lines between probe and client binding. Users should update to a Linux kernel version that includes this fix. Patch status is not explicitly confirmed in the provided data; check the official Linux kernel advisories or vendor updates for the exact fixed versions and apply the official patch accordingly.
In the Linux kernel, the following vulnerability has been resolved: mailbox: mtk-adsp: fix UAF during device teardown When the SOF audio driver… (CVE-2026-72486)
Description
A use-after-free (UAF) vulnerability in the Linux kernel's mailbox driver for the MediaTek ADSP (mtk-adsp) was resolved. The issue occurs during device teardown when the SOF audio driver fails to initialize, leading to a freed snd_sof_dev object still being accessed by a mailbox client callback. This can cause a kernel crash due to accessing freed memory. The fix involves properly disabling IRQs during shutdown and masking IRQs between probe and client binding to prevent late interrupts from triggering the UAF.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-72486 describes a use-after-free vulnerability in the Linux kernel mailbox driver for MediaTek ADSP (mtk-adsp). When the SOF audio driver fails to initialize, its device resource unwind frees the snd_sof_dev object that the mailbox client accesses via a callback. The mailbox shutdown clears command registers but leaves the IRQ line unmasked, allowing a late interrupt to queue a handler that accesses freed memory, causing a kernel crash detected by KASAN. The fix disables IRQs during shutdown (waiting for in-flight interrupts) and requests the IRQ with IRQF_NO_AUTOEN to keep it masked until the client binds, preventing early or late interrupts from causing use-after-free conditions.
Potential Impact
This vulnerability can cause a kernel crash (use-after-free) in affected Linux kernel versions running the SOF audio driver with MediaTek ADSP mailbox support. The crash occurs when interrupts access freed memory after a failed driver probe, potentially leading to denial of service. There is no indication of privilege escalation or code execution from the provided data.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to properly disable IRQs during device teardown and mask IRQ lines between probe and client binding. Users should update to a Linux kernel version that includes this fix. Patch status is not explicitly confirmed in the provided data; check the official Linux kernel advisories or vendor updates for the exact fixed versions and apply the official patch accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-7xg7-8g6q-847f
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-72486"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a808b6dbf8831d5394f8b3b
Added to database: 08/15/2026, 15:53:17 UTC
Last enriched: 08/15/2026, 16:20:25 UTC
Last updated: 08/16/2026, 00:41:15 UTC
Views: 3
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