CVE-2026-72486
mailbox: mtk-adsp: fix UAF during device teardown
Description
In the Linux kernel, the following vulnerability has been resolved: mailbox: mtk-adsp: fix UAF during device teardown When the SOF audio driver fails to initialize (e.g. firmware boot timeout), its devres unwind frees the snd_sof_dev object that the mailbox client (mtk-adsp-ipc) reaches via chan->cl->rx_callback. The mtk-adsp-mailbox shutdown clears the mailbox command registers but leaves the IRQ line unmasked, so a late interrupt can still queue a threaded handler after mbox_free_channel() had cleared chan->cl, and mbox_chan_received_data() would then trigger UAF: BUG: KASAN: slab-use-after-free in sof_ipc3_validate_fw_version sof_ipc3_validate_fw_version sof_ipc3_do_rx_work sof_ipc3_rx_msg mt8196_dsp_handle_request mtk_adsp_ipc_recv mbox_chan_received_data mtk_adsp_mbox_isr irq_thread_fn Freed by task ...: kfree devres_release_all really_probe ... (sof-audio-of-mt8196 probe failure) The crash was observed roughly three seconds after the failed probe. disable_irq() in shutdown and enable_irq() in startup. disable_irq() also waits for any in-flight interrupts, so by the time mbox_free_channel() proceeds to clear chan->cl no rx_callback can run. In addition, request the IRQ with IRQF_NO_AUTOEN so it stays masked between probe and the first client bind — otherwise an early interrupt can crash on chan->cl == NULL in mbox_chan_received_data().
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:19 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to the resolved version.
- Ensure IRQs are properly masked during device startup.
- Ensure IRQs are properly disabled during device shutdown.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72486.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72486 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72486
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72486 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72486 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'b6337a08a63eef8efcffe3c01d479badda6bbbdb', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'e519c1d8c5efb5cd8d4c5bb3fe39b1bbb812bdb9', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'fc6c3deb1d4c0adebf7dee0b8af4082af3f17690', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': '7d881615fb6373f71fc628b3f00186aeca87a3d5', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': '25d6ea6c76e1b1b7c57337b2f8f1b6fc8d5c52bc', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'b57d1a40bc43258372fa1f4d39305e093947a262', 'versionType': 'git'}], 'programFiles': ['drivers/mailbox/mtk-adsp-mailbox.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/mailbox/mtk-adsp-mailbox.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'b6337a08a63eef8efcffe3c01d479badda6bbbdb', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'e519c1d8c5efb5cd8d4c5bb3fe39b1bbb812bdb9', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'fc6c3deb1d4c0adebf7dee0b8af4082af3f17690', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': '7d881615fb6373f71fc628b3f00186aeca87a3d5', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': '25d6ea6c76e1b1b7c57337b2f8f1b6fc8d5c52bc', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'b57d1a40bc43258372fa1f4d39305e093947a262', 'versionType': 'git'}], 'programFiles': ['drivers/mailbox/mtk-adsp-mailbox.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/mailbox/mtk-adsp-mailbox.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'b6337a08a63eef8efcffe3c01d479badda6bbbdb', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'e519c1d8c5efb5cd8d4c5bb3fe39b1bbb812bdb9', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'fc6c3deb1d4c0adebf7dee0b8af4082af3f17690', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': '7d881615fb6373f71fc628b3f00186aeca87a3d5', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': '25d6ea6c76e1b1b7c57337b2f8f1b6fc8d5c52bc', 'versionType': 'git'}, {'status': 'affected', 'version': 'af2dfa96c52d042df5deb29fb6e32d3ff4d76a61', 'lessThan': 'b57d1a40bc43258372fa1f4d39305e093947a262', 'versionType': 'git'}], 'programFiles': ['drivers/mailbox/mtk-adsp-mailbox.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/mailbox/mtk-adsp-mailbox.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: mailbox: mtk-adsp: fix UAF during device teardown When the SOF audio driver fails to initialize (e.g. firmware boot timeout), its devres unwind frees the snd_sof_dev object that the mailbox client (mtk-adsp-ipc) reaches via chan->cl->rx_callback. The mtk-adsp-mailbox shutdown clears the mailbox command registers but leaves the IRQ line unmasked, so a late interrupt can still queue a threaded handler after mbox_free_channel() had cleared chan->cl, and mbox_chan_received_data() would then trigger UAF: BUG: KASAN: slab-use-after-free in sof_ipc3_validate_fw_version sof_ipc3_validate_fw_version sof_ipc3_do_rx_work sof_ipc3_rx_msg mt8196_dsp_handle_request mtk_adsp_ipc_recv mbox_chan_received_data mtk_adsp_mbox_isr irq_thread_fn Freed by task ...: kfree devres_release_all really_probe ... (sof-audio-of-mt8196 probe failure) The crash was observed roughly three seconds after the failed probe. disable_irq() in shutdown and enable_irq() in startup. disable_irq() also waits for any in-flight interrupts, so by the time mbox_free_channel() proceeds to clear chan->cl no rx_callback can run. In addition, request the IRQ with IRQF_NO_AUTOEN so it stays masked between probe and the first client bind — otherwise an early interrupt can crash on chan->cl == NULL in mbox_chan_received_data(). Added Reference https://git.kernel.org/stable/c/25d6ea6c76e1b1b7c57337b2f8f1b6fc8d5c52bc Added Reference https://git.kernel.org/stable/c/7d881615fb6373f71fc628b3f00186aeca87a3d5 Added Reference https://git.kernel.org/stable/c/b57d1a40bc43258372fa1f4d39305e093947a262 Added Reference https://git.kernel.org/stable/c/b6337a08a63eef8efcffe3c01d479badda6bbbdb Added Reference https://git.kernel.org/stable/c/e519c1d8c5efb5cd8d4c5bb3fe39b1bbb812bdb9 Added Reference https://git.kernel.org/stable/c/fc6c3deb1d4c0adebf7dee0b8af4082af3f17690