CVE-2026-72486
Estado: RecibidaSin puntuar—
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:
The crash was observed roughly three seconds after the failed probe.
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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().
Detalles técnicos trazas, registros y código del informe original
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)
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 11
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/25d6ea6c76e1b1b7c57337b2f8f1b6fc8d5c52bc
- https://git.kernel.org/stable/c/7d881615fb6373f71fc628b3f00186aeca87a3d5
- https://git.kernel.org/stable/c/b57d1a40bc43258372fa1f4d39305e093947a262
- https://git.kernel.org/stable/c/b6337a08a63eef8efcffe3c01d479badda6bbbdb
- https://git.kernel.org/stable/c/e519c1d8c5efb5cd8d4c5bb3fe39b1bbb812bdb9
- https://git.kernel.org/stable/c/fc6c3deb1d4c0adebf7dee0b8af4082af3f17690
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-72486",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"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"
}
]
}
],
"published": "2026-08-15T06:22:22.860",
"references": [
{
"url": "https://git.kernel.org/stable/c/25d6ea6c76e1b1b7c57337b2f8f1b6fc8d5c52bc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7d881615fb6373f71fc628b3f00186aeca87a3d5",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b57d1a40bc43258372fa1f4d39305e093947a262",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b6337a08a63eef8efcffe3c01d479badda6bbbdb",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e519c1d8c5efb5cd8d4c5bb3fe39b1bbb812bdb9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fc6c3deb1d4c0adebf7dee0b8af4082af3f17690",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"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->cl->rx_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->cl, 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->cl 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 — otherwise an early interrupt\ncan crash on chan->cl == NULL in mbox_chan_received_data()."
}
],
"lastModified": "2026-08-17T06:19:16.810",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}