CVE-2026-72486

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72486", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.936Z", "datePublished": "2026-08-15T05:57:22.821Z", "dateUpdated": "2026-08-17T05:15:36.888Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:15:36.888Z"}, "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 \u2014 otherwise an early interrupt\ncan crash on chan->cl == NULL in mbox_chan_received_data()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mailbox/mtk-adsp-mailbox.c"], "versions": [{"version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61", "lessThan": "b6337a08a63eef8efcffe3c01d479badda6bbbdb", "status": "affected", "versionType": "git"}, {"version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61", "lessThan": "e519c1d8c5efb5cd8d4c5bb3fe39b1bbb812bdb9", "status": "affected", "versionType": "git"}, {"version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61", "lessThan": "fc6c3deb1d4c0adebf7dee0b8af4082af3f17690", "status": "affected", "versionType": "git"}, {"version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61", "lessThan": "7d881615fb6373f71fc628b3f00186aeca87a3d5", "status": "affected", "versionType": "git"}, {"version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61", "lessThan": "25d6ea6c76e1b1b7c57337b2f8f1b6fc8d5c52bc", "status": "affected", "versionType": "git"}, {"version": "af2dfa96c52d042df5deb29fb6e32d3ff4d76a61", "lessThan": "b57d1a40bc43258372fa1f4d39305e093947a262", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mailbox/mtk-adsp-mailbox.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.2"}]}]}], "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"}}}}

{}

{"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->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 \u2014 otherwise an early interrupt\ncan crash on chan->cl == 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"}

{"bugzilla": {"description": "kernel: mailbox: mtk-adsp: fix UAF during device teardown", "id": "2516266", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516266"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's `mtk-adsp` mailbox driver. During device teardown, if the Sound Open Firmware (SOF) audio driver fails to initialize, a timing issue can occur where an interrupt is processed after the associated memory has been released. This Use-After-Free (UAF) vulnerability can lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-72486", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72486\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72486\nhttps://lore.kernel.org/linux-cve-announce/2026081538-CVE-2026-72486-4bac@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af2dfa96c52d042df5deb29fb6e32d3ff4d76a61,b6337a08a63eef8efcffe3c01d479badda6bbbdb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af2dfa96c52d042df5deb29fb6e32d3ff4d76a61,e519c1d8c5efb5cd8d4c5bb3fe39b1bbb812bdb9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af2dfa96c52d042df5deb29fb6e32d3ff4d76a61,fc6c3deb1d4c0adebf7dee0b8af4082af3f17690)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af2dfa96c52d042df5deb29fb6e32d3ff4d76a61,7d881615fb6373f71fc628b3f00186aeca87a3d5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af2dfa96c52d042df5deb29fb6e32d3ff4d76a61,25d6ea6c76e1b1b7c57337b2f8f1b6fc8d5c52bc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af2dfa96c52d042df5deb29fb6e32d3ff4d76a61,b57d1a40bc43258372fa1f4d39305e093947a262)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,8.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T17:30:11.724871+00:00", "updated": "2026-08-18T05:45:03.303033+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}