{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-93070", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T15:57:05.661Z", "datePublished": "2026-09-17T16:10:54.393Z", "dateUpdated": "2026-10-19T09:05:06.091Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:05:06.091Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: ipu6: Do not free aux device pdata after init\n\nipu6_bus_initialize_device() stores the isys/psys pdata pointer in\nstruct ipu6_bus_device and initializes the auxiliary device. After that\npoint, error unwinding must drop the auxiliary device reference and let\nipu6_bus_release() free both the bus device and adev->pdata.\n\nThe isys and psys init paths already call put_device() when MMU\ninitialization fails, and ipu6_bus_add_device() calls\nauxiliary_device_uninit() on auxiliary_device_add() failure. Both paths\ntherefore run the bus release callback. The extra kfree(pdata) in the\ncallers can release the same object a second time.\n\nRemove the manual pdata frees after the auxiliary device has been\ninitialized.\n\nThis issue was found by a static analysis checker and confirmed by\nmanual source review." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The extra kfree(pdata) runs only in ipu6_isys_init()/ipu6_psys_init() after ipu6_bus_initialize_device(), called from ipu6_pci_probe() on Intel IPU6 PCI IDs (0x9a19/0x4e19/0x465d/0x462e/0xa75d/0x7d19). V4L2 ioctls and received packets never enter those error paths; this is a local PCI probe, not a network or USB protocol path.\nAC:L - After ipu6_mmu_init() fails, put_device() runs ipu6_bus_release() which kfree(adev->pdata) before the extra kfree(pdata); ipu6_bus_add_device() does the same via auxiliary_device_uninit() when auxiliary_device_add() fails. Both double-frees then run with no race. A local attacker can induce those ENOMEM failures (alloc_dma_mapping()/device_add()) with allocation pressure.\nPR:L - ipu6_pci_probe() performs no capable() check. Sysfs bind/modprobe needs init-namespace admin, but probe already runs automatically: request_firmware() for isp->cpd_fw_name waits for userspace, and ipu_bridge_init() can return -EPROBE_DEFER until IVSC is ready then retry. An ordinary local user can apply memory pressure during that automatic probe, so Low is the higher defensible value.\nUI:N - The double-free occurs inside ipu6_pci_probe error unwinding in ipu6_isys_init()/ipu6_psys_init(); no mount, file open, or other victim action is required. PCI enumeration, firmware wait, and IVSC deferred retries are kernel/udev driven.\nS:U - kfree of the isys/psys pdata slab and the containing ipu6_bus_device corrupts host kernel heap in the same security authority as the IPU6 PCI driver. This is not a VM escape, IOMMU bypass, or sandbox boundary cross.\nC:H - ipu6_bus_release() already kfree(adev->pdata) and kfree(adev); the extra kfree(pdata) is a SLUB double-free of ipu6_isys_pdata/ipu6_psys_pdata, and the MMU-fail path then reads isys_adev->mmu after adev was freed. Reclaiming those slabs can disclose kernel memory.\nI:H - Double-free of pdata after ipu6_bus_release(), plus kfree of struct ipu6_bus_device on the MMU-fail put_device() path, yields two owners of one heap object. That overlapping allocation can corrupt live kernel structures and is exploitable for arbitrary writes or control-flow hijack, not merely a clean fail.\nA:H - The second kfree(pdata) after ipu6_bus_release() trips SLAB_FREELIST_HARDENED BUG_ON or corrupts the freelist, and the MMU-fail path dereferences the already-freed ipu6_bus_device via isys_adev->mmu. Either produces a kernel oops or panic during probe unwind." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/pci/intel/ipu6/ipu6.c" ], "versions": [ { "version": "cb3117b074aefb0320d8d728a0a7f277a121adbd", "lessThan": "faa1eb97f0e66bf122f44b62be6b323f86333e9f", "status": "affected", "versionType": "git" }, { "version": "cb3117b074aefb0320d8d728a0a7f277a121adbd", "lessThan": "5323ed5a7bb2568191ec676b2035b0396105aa05", "status": "affected", "versionType": "git" }, { "version": "cb3117b074aefb0320d8d728a0a7f277a121adbd", "lessThan": "7d102d1f0631807a491a140f67c9628dea85dfd2", "status": "affected", "versionType": "git" }, { "version": "cb3117b074aefb0320d8d728a0a7f277a121adbd", "lessThan": "9be07216af4cfc4813e1a46ce26407d31ea845de", "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/media/pci/intel/ipu6/ipu6.c" ], "versions": [ { "version": "6.10", "status": "affected" }, { "version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "6.10", "versionEndExcluding": "6.12.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.18.52" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.2.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/faa1eb97f0e66bf122f44b62be6b323f86333e9f" }, { "url": "https://git.kernel.org/stable/c/5323ed5a7bb2568191ec676b2035b0396105aa05" }, { "url": "https://git.kernel.org/stable/c/7d102d1f0631807a491a140f67c9628dea85dfd2" }, { "url": "https://git.kernel.org/stable/c/9be07216af4cfc4813e1a46ce26407d31ea845de" } ], "title": "media: ipu6: Do not free aux device pdata after init", "x_generator": { "engine": "bippy-1.2.0" } } } }