248 lines
15 KiB
JSON
248 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2022-48796",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-07-16T11:38:08.895Z",
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"datePublished": "2024-07-16T11:43:50.796Z",
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"dateUpdated": "2026-08-05T08:52:23.915Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:52:23.915Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu: Fix potential use-after-free during probe\n\nKasan has reported the following use after free on dev->iommu.\nwhen a device probe fails and it is in process of freeing dev->iommu\nin dev_iommu_free function, a deferred_probe_work_func runs in parallel\nand tries to access dev->iommu->fwspec in of_iommu_configure path thus\ncausing use after free.\n\nBUG: KASAN: use-after-free in of_iommu_configure+0xb4/0x4a4\nRead of size 8 at addr ffffff87a2f1acb8 by task kworker/u16:2/153\n\nWorkqueue: events_unbound deferred_probe_work_func\nCall trace:\n dump_backtrace+0x0/0x33c\n show_stack+0x18/0x24\n dump_stack_lvl+0x16c/0x1e0\n print_address_description+0x84/0x39c\n __kasan_report+0x184/0x308\n kasan_report+0x50/0x78\n __asan_load8+0xc0/0xc4\n of_iommu_configure+0xb4/0x4a4\n of_dma_configure_id+0x2fc/0x4d4\n platform_dma_configure+0x40/0x5c\n really_probe+0x1b4/0xb74\n driver_probe_device+0x11c/0x228\n __device_attach_driver+0x14c/0x304\n bus_for_each_drv+0x124/0x1b0\n __device_attach+0x25c/0x334\n device_initial_probe+0x24/0x34\n bus_probe_device+0x78/0x134\n deferred_probe_work_func+0x130/0x1a8\n process_one_work+0x4c8/0x970\n worker_thread+0x5c8/0xaec\n kthread+0x1f8/0x220\n ret_from_fork+0x10/0x18\n\nAllocated by task 1:\n ____kasan_kmalloc+0xd4/0x114\n __kasan_kmalloc+0x10/0x1c\n kmem_cache_alloc_trace+0xe4/0x3d4\n __iommu_probe_device+0x90/0x394\n probe_iommu_group+0x70/0x9c\n bus_for_each_dev+0x11c/0x19c\n bus_iommu_probe+0xb8/0x7d4\n bus_set_iommu+0xcc/0x13c\n arm_smmu_bus_init+0x44/0x130 [arm_smmu]\n arm_smmu_device_probe+0xb88/0xc54 [arm_smmu]\n platform_drv_probe+0xe4/0x13c\n really_probe+0x2c8/0xb74\n driver_probe_device+0x11c/0x228\n device_driver_attach+0xf0/0x16c\n __driver_attach+0x80/0x320\n bus_for_each_dev+0x11c/0x19c\n driver_attach+0x38/0x48\n bus_add_driver+0x1dc/0x3a4\n driver_register+0x18c/0x244\n __platform_driver_register+0x88/0x9c\n init_module+0x64/0xff4 [arm_smmu]\n do_one_initcall+0x17c/0x2f0\n do_init_module+0xe8/0x378\n load_module+0x3f80/0x4a40\n __se_sys_finit_module+0x1a0/0x1e4\n __arm64_sys_finit_module+0x44/0x58\n el0_svc_common+0x100/0x264\n do_el0_svc+0x38/0xa4\n el0_svc+0x20/0x30\n el0_sync_handler+0x68/0xac\n el0_sync+0x160/0x180\n\nFreed by task 1:\n kasan_set_track+0x4c/0x84\n kasan_set_free_info+0x28/0x4c\n ____kasan_slab_free+0x120/0x15c\n __kasan_slab_free+0x18/0x28\n slab_free_freelist_hook+0x204/0x2fc\n kfree+0xfc/0x3a4\n __iommu_probe_device+0x284/0x394\n probe_iommu_group+0x70/0x9c\n bus_for_each_dev+0x11c/0x19c\n bus_iommu_probe+0xb8/0x7d4\n bus_set_iommu+0xcc/0x13c\n arm_smmu_bus_init+0x44/0x130 [arm_smmu]\n arm_smmu_device_probe+0xb88/0xc54 [arm_smmu]\n platform_drv_probe+0xe4/0x13c\n really_probe+0x2c8/0xb74\n driver_probe_device+0x11c/0x228\n device_driver_attach+0xf0/0x16c\n __driver_attach+0x80/0x320\n bus_for_each_dev+0x11c/0x19c\n driver_attach+0x38/0x48\n bus_add_driver+0x1dc/0x3a4\n driver_register+0x18c/0x244\n __platform_driver_register+0x88/0x9c\n init_module+0x64/0xff4 [arm_smmu]\n do_one_initcall+0x17c/0x2f0\n do_init_module+0xe8/0x378\n load_module+0x3f80/0x4a40\n __se_sys_finit_module+0x1a0/0x1e4\n __arm64_sys_finit_module+0x44/0x58\n el0_svc_common+0x100/0x264\n do_el0_svc+0x38/0xa4\n el0_svc+0x20/0x30\n el0_sync_handler+0x68/0xac\n el0_sync+0x160/0x180\n\nFix this by setting dev->iommu to NULL first and\nthen freeing dev_iommu structure in dev_iommu_free\nfunction."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable path runs during local IOMMU driver registration and device probe (bus_set_iommu → __iommu_probe_device / deferred_probe → of_iommu_configure), not via network packets or physical device attachment.\nAC:L - Loading/registering the IOMMU driver simultaneously drives both sides of the race (failed __iommu_probe_device freeing dev->iommu and deferred_probe calling of_iommu_configure), so the attacker can create and retry the race; UAF races under attacker influence score AC:L.\nPR:L - While the demonstrated trigger is finit_module of arm_smmu, an unprivileged local process can exploit the race window via heap spray when that probe runs (boot/late module load), and PR:L is the higher-severity choice under uncertainty versus requiring CAP_SYS_MODULE.\nUI:N - No victim action is required; exploitation depends only on the attacker-controlled or co-resident process racing the kernel probe/free path.\nS:U - This is a kernel heap use-after-free enabling privilege escalation within the kernel's security authority, not a guest/device IOMMU DMA isolation bypass that would change scope.\nC:H - Use-after-free of dev_iommu/fwspec lets an attacker control freed object contents and obtain arbitrary kernel read primitives per UAF scoring guidance.\nI:H - The same UAF enables heap spraying and hijacking of fwspec/ops usage in of_iommu_configure, yielding arbitrary write or control-flow hijacking in kernel context.\nA:H - The UAF can crash the kernel (KASAN-reported oops/panic) even when not fully turned into a reliable exploit, so availability impact is High."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/iommu/iommu.c"
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],
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"versions": [
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{
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"version": "0c830e6b32826311fc2b9ea1f4679be0f4ef0933",
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"lessThan": "cb86e511e78e796de6947b8f3acca1b7c76fb2ff",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c830e6b32826311fc2b9ea1f4679be0f4ef0933",
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"lessThan": "65ab30f6a6952fa9ee13009862736cf8d110e6e5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c830e6b32826311fc2b9ea1f4679be0f4ef0933",
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"lessThan": "f74fc4b5bd533ea3d30ce47cccb8ef8d21fda85a",
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"status": "affected",
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{
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"version": "0c830e6b32826311fc2b9ea1f4679be0f4ef0933",
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"lessThan": "b54240ad494300ff0994c4539a531727874381f4",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/iommu/iommu.c"
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],
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"versions": [
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{
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"version": "5.3",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.3",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.101",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.24",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.16.10",
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"lessThanOrEqual": "5.16.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.17",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.3",
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"versionEndExcluding": "5.10.101"
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},
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"vulnerable": true,
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/cb86e511e78e796de6947b8f3acca1b7c76fb2ff"
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},
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{
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"url": "https://git.kernel.org/stable/c/65ab30f6a6952fa9ee13009862736cf8d110e6e5"
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{
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"url": "https://git.kernel.org/stable/c/f74fc4b5bd533ea3d30ce47cccb8ef8d21fda85a"
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{
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"url": "https://git.kernel.org/stable/c/b54240ad494300ff0994c4539a531727874381f4"
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}
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],
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"title": "iommu: Fix potential use-after-free during probe",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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"adp": [
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"shortName": "CVE",
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"dateUpdated": "2024-08-03T15:25:01.525Z"
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"title": "CVE Program Container",
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"references": [
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"url": "https://git.kernel.org/stable/c/cb86e511e78e796de6947b8f3acca1b7c76fb2ff",
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2022-48796",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2024-09-10T16:59:19.404709Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"dateUpdated": "2024-09-11T17:34:14.954Z"
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}
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}
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]
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}
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} |