CVE-2026-72486 (GCVE-0-2026-72486)
Vulnerability from cvelistv5
Published
2026-08-15 05:57
Modified
2026-08-17 05:15
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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().
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: af2dfa96c52d042df5deb29fb6e32d3ff4d76a61 Version: af2dfa96c52d042df5deb29fb6e32d3ff4d76a61 Version: af2dfa96c52d042df5deb29fb6e32d3ff4d76a61 Version: af2dfa96c52d042df5deb29fb6e32d3ff4d76a61 Version: af2dfa96c52d042df5deb29fb6e32d3ff4d76a61 Version: af2dfa96c52d042df5deb29fb6e32d3ff4d76a61 |
||
{
"containers": {
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{
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"product": "Linux",
"programFiles": [
"drivers/mailbox/mtk-adsp-mailbox.c"
],
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"version": "0",
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"status": "unaffected",
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{
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"status": "unaffected",
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{
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"status": "unaffected",
"version": "6.18.40",
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{
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"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"vulnerable": true
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"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: mtk-adsp: fix UAF during device teardown\n\nWhen the SOF audio driver fails to initialize (e.g. firmware boot\ntimeout), its devres unwind frees the snd_sof_dev object that the\nmailbox client (mtk-adsp-ipc) reaches via chan-\u003ecl-\u003erx_callback.\nThe mtk-adsp-mailbox shutdown clears the mailbox command registers\nbut leaves the IRQ line unmasked, so a late interrupt can still\nqueue a threaded handler after mbox_free_channel() had cleared\nchan-\u003ecl, and mbox_chan_received_data() would then trigger UAF:\n\n BUG: KASAN: slab-use-after-free in sof_ipc3_validate_fw_version\n sof_ipc3_validate_fw_version\n sof_ipc3_do_rx_work\n sof_ipc3_rx_msg\n mt8196_dsp_handle_request\n mtk_adsp_ipc_recv\n mbox_chan_received_data\n mtk_adsp_mbox_isr\n irq_thread_fn\n Freed by task ...:\n kfree\n devres_release_all\n really_probe\n ... (sof-audio-of-mt8196 probe failure)\n\nThe crash was observed roughly three seconds after the failed probe.\n\ndisable_irq() in shutdown and enable_irq() in startup. disable_irq()\nalso waits for any in-flight interrupts, so by the time\nmbox_free_channel() proceeds to clear chan-\u003ecl no rx_callback can run.\n\nIn addition, request the IRQ with IRQF_NO_AUTOEN so it stays masked\nbetween probe and the first client bind \u2014 otherwise an early interrupt\ncan crash on chan-\u003ecl == NULL in mbox_chan_received_data()."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:15:36.888Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/b6337a08a63eef8efcffe3c01d479badda6bbbdb"
},
{
"url": "https://git.kernel.org/stable/c/e519c1d8c5efb5cd8d4c5bb3fe39b1bbb812bdb9"
},
{
"url": "https://git.kernel.org/stable/c/fc6c3deb1d4c0adebf7dee0b8af4082af3f17690"
},
{
"url": "https://git.kernel.org/stable/c/7d881615fb6373f71fc628b3f00186aeca87a3d5"
},
{
"url": "https://git.kernel.org/stable/c/25d6ea6c76e1b1b7c57337b2f8f1b6fc8d5c52bc"
},
{
"url": "https://git.kernel.org/stable/c/b57d1a40bc43258372fa1f4d39305e093947a262"
}
],
"title": "mailbox: mtk-adsp: fix UAF during device teardown",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-72486",
"datePublished": "2026-08-15T05:57:22.821Z",
"dateReserved": "2026-08-09T03:40:39.936Z",
"dateUpdated": "2026-08-17T05:15:36.888Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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