FKIE_CVE-2026-72486

Vulnerability from fkie_nvd - Published: 2026-08-15 06:22 - Updated: 2026-08-17 06:19
Severity
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/25d6ea6c76e1b1b7c57337b2f8f1b6fc8d5c52bc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d881615fb6373f71fc628b3f00186aeca87a3d5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b57d1a40bc43258372fa1f4d39305e093947a262
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b6337a08a63eef8efcffe3c01d479badda6bbbdb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e519c1d8c5efb5cd8d4c5bb3fe39b1bbb812bdb9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fc6c3deb1d4c0adebf7dee0b8af4082af3f17690
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mailbox/mtk-adsp-mailbox.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b6337a08a63eef8efcffe3c01d479badda6bbbdb",
              "status": "affected",
              "version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61",
              "versionType": "git"
            },
            {
              "lessThan": "e519c1d8c5efb5cd8d4c5bb3fe39b1bbb812bdb9",
              "status": "affected",
              "version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61",
              "versionType": "git"
            },
            {
              "lessThan": "fc6c3deb1d4c0adebf7dee0b8af4082af3f17690",
              "status": "affected",
              "version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61",
              "versionType": "git"
            },
            {
              "lessThan": "7d881615fb6373f71fc628b3f00186aeca87a3d5",
              "status": "affected",
              "version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61",
              "versionType": "git"
            },
            {
              "lessThan": "25d6ea6c76e1b1b7c57337b2f8f1b6fc8d5c52bc",
              "status": "affected",
              "version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61",
              "versionType": "git"
            },
            {
              "lessThan": "b57d1a40bc43258372fa1f4d39305e093947a262",
              "status": "affected",
              "version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/mailbox/mtk-adsp-mailbox.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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()."
    }
  ],
  "id": "CVE-2026-72486",
  "lastModified": "2026-08-17T06:19:16.810",
  "metrics": {},
  "published": "2026-08-15T06:22:22.860",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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