{"api_version":"1","generated_at":"2026-09-18T09:33:45+00:00","cve":"CVE-2026-92521","urls":{"html":"https://cve.report/CVE-2026-92521","api":"https://cve.report/api/cve/CVE-2026-92521.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-92521","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-92521"},"summary":{"title":"ACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root\n\nacpi_pci_root_add() assigns the freshly allocated root to\ndevice->driver_data before dmar_device_add() and pci_acpi_scan_root().\nBoth failure paths reach the end: label where root is kfree()'d, but\nonly the pci_acpi_scan_root() path clears driver_data first.\n\nWhen dmar_device_add() fails during a hot-add, root is freed while\ndevice->driver_data still points at it.  The ACPI core does not clear\ndriver_data on attach failure, so a later acpi_pci_find_root() call may\ndereference this dangling pointer.\n\nacpi_pci_root_remove() has the same problem: it frees root without\nclearing device->driver_data, leaving a dangling pointer behind after\nthe root bridge is removed.\n\nMove the NULL assignment to the shared end: label so every error path in\nacpi_pci_root_add() clears driver_data before freeing root, and clear it\nin acpi_pci_root_remove() as well, so the object is never left reachable\nthrough driver_data after being freed.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:55","updated_at":"2026-09-17 17:17:55"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/3eee4c21931dc048ce63b86809f04e4e6f0dcad5","name":"https://git.kernel.org/stable/c/3eee4c21931dc048ce63b86809f04e4e6f0dcad5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217","name":"https://git.kernel.org/stable/c/6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a285fa3780c768dcc51c76768707d099a2cc611d","name":"https://git.kernel.org/stable/c/a285fa3780c768dcc51c76768707d099a2cc611d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/70cf773cca30a10b4964c24520a71279c974b899","name":"https://git.kernel.org/stable/c/70cf773cca30a10b4964c24520a71279c974b899","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2","name":"https://git.kernel.org/stable/c/3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/321bb0eb1486a0d575f02e24e3f4170e408c2f51","name":"https://git.kernel.org/stable/c/321bb0eb1486a0d575f02e24e3f4170e408c2f51","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6aaf6dbf54fdfae096f3f90a79e9614e46579280","name":"https://git.kernel.org/stable/c/6aaf6dbf54fdfae096f3f90a79e9614e46579280","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8a742141f7ab84975aa758b775567ef4740ef0cf","name":"https://git.kernel.org/stable/c/8a742141f7ab84975aa758b775567ef4740ef0cf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92521","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92521","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 321bb0eb1486a0d575f02e24e3f4170e408c2f51 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 a285fa3780c768dcc51c76768707d099a2cc611d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 6aaf6dbf54fdfae096f3f90a79e9614e46579280 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 70cf773cca30a10b4964c24520a71279c974b899 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 3eee4c21931dc048ce63b86809f04e4e6f0dcad5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 8a742141f7ab84975aa758b775567ef4740ef0cf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.28","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.28 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.270 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/acpi/pci_root.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"321bb0eb1486a0d575f02e24e3f4170e408c2f51","status":"affected","version":"db89b4f0dbab837d0f3de2c3e9427a8d5393afa3","versionType":"git"},{"lessThan":"3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2","status":"affected","version":"db89b4f0dbab837d0f3de2c3e9427a8d5393afa3","versionType":"git"},{"lessThan":"a285fa3780c768dcc51c76768707d099a2cc611d","status":"affected","version":"db89b4f0dbab837d0f3de2c3e9427a8d5393afa3","versionType":"git"},{"lessThan":"6aaf6dbf54fdfae096f3f90a79e9614e46579280","status":"affected","version":"db89b4f0dbab837d0f3de2c3e9427a8d5393afa3","versionType":"git"},{"lessThan":"70cf773cca30a10b4964c24520a71279c974b899","status":"affected","version":"db89b4f0dbab837d0f3de2c3e9427a8d5393afa3","versionType":"git"},{"lessThan":"3eee4c21931dc048ce63b86809f04e4e6f0dcad5","status":"affected","version":"db89b4f0dbab837d0f3de2c3e9427a8d5393afa3","versionType":"git"},{"lessThan":"6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217","status":"affected","version":"db89b4f0dbab837d0f3de2c3e9427a8d5393afa3","versionType":"git"},{"lessThan":"8a742141f7ab84975aa758b775567ef4740ef0cf","status":"affected","version":"db89b4f0dbab837d0f3de2c3e9427a8d5393afa3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/acpi/pci_root.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.28"},{"lessThan":"2.6.28","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"2.6.28","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root\n\nacpi_pci_root_add() assigns the freshly allocated root to\ndevice->driver_data before dmar_device_add() and pci_acpi_scan_root().\nBoth failure paths reach the end: label where root is kfree()'d, but\nonly the pci_acpi_scan_root() path clears driver_data first.\n\nWhen dmar_device_add() fails during a hot-add, root is freed while\ndevice->driver_data still points at it.  The ACPI core does not clear\ndriver_data on attach failure, so a later acpi_pci_find_root() call may\ndereference this dangling pointer.\n\nacpi_pci_root_remove() has the same problem: it frees root without\nclearing device->driver_data, leaving a dangling pointer behind after\nthe root bridge is removed.\n\nMove the NULL assignment to the shared end: label so every error path in\nacpi_pci_root_add() clears driver_data before freeing root, and clear it\nin acpi_pci_root_remove() as well, so the object is never left reachable\nthrough driver_data after being freed."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:10:28.144Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/321bb0eb1486a0d575f02e24e3f4170e408c2f51"},{"url":"https://git.kernel.org/stable/c/3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2"},{"url":"https://git.kernel.org/stable/c/a285fa3780c768dcc51c76768707d099a2cc611d"},{"url":"https://git.kernel.org/stable/c/6aaf6dbf54fdfae096f3f90a79e9614e46579280"},{"url":"https://git.kernel.org/stable/c/70cf773cca30a10b4964c24520a71279c974b899"},{"url":"https://git.kernel.org/stable/c/3eee4c21931dc048ce63b86809f04e4e6f0dcad5"},{"url":"https://git.kernel.org/stable/c/6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217"},{"url":"https://git.kernel.org/stable/c/8a742141f7ab84975aa758b775567ef4740ef0cf"}],"title":"ACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-92521","datePublished":"2026-09-17T16:10:28.144Z","dateReserved":"2026-09-16T12:21:13.874Z","dateUpdated":"2026-09-17T16:10:28.144Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:55","lastModifiedDate":"2026-09-17 17:17:55","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"92521","Ordinal":"1","Title":"ACPI: PCI: Clear driver_data on all paths that free the acpi_pci","CVE":"CVE-2026-92521","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"92521","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root\n\nacpi_pci_root_add() assigns the freshly allocated root to\ndevice->driver_data before dmar_device_add() and pci_acpi_scan_root().\nBoth failure paths reach the end: label where root is kfree()'d, but\nonly the pci_acpi_scan_root() path clears driver_data first.\n\nWhen dmar_device_add() fails during a hot-add, root is freed while\ndevice->driver_data still points at it.  The ACPI core does not clear\ndriver_data on attach failure, so a later acpi_pci_find_root() call may\ndereference this dangling pointer.\n\nacpi_pci_root_remove() has the same problem: it frees root without\nclearing device->driver_data, leaving a dangling pointer behind after\nthe root bridge is removed.\n\nMove the NULL assignment to the shared end: label so every error path in\nacpi_pci_root_add() clears driver_data before freeing root, and clear it\nin acpi_pci_root_remove() as well, so the object is never left reachable\nthrough driver_data after being freed.","Type":"Description","Title":"ACPI: PCI: Clear driver_data on all paths that free the acpi_pci"}]}}}