{"cve":"CVE-2026-72486","nvd":{"published":"2026-08-15T06:22:22.860","modified":"2026-08-17T06:19:16.810","status":"Received","description":"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().","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["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"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:48:17.459049833+00:00"},"epss":{"cve":"CVE-2026-72486","score":0.00215,"percentile":0.1184,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}