CVE-2021-47341 (GCVE-0-2021-47341)
Vulnerability from cvelistv5
Published
2024-05-21 14:35
Modified
2026-08-05 08:47
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio BUG: KASAN: use-after-free in kvm_vm_ioctl_unregister_coalesced_mmio+0x7c/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:183 Read of size 8 at addr ffff0000c03a2500 by task syz-executor083/4269 CPU: 5 PID: 4269 Comm: syz-executor083 Not tainted 5.10.0 #7 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace+0x0/0x2d0 arch/arm64/kernel/stacktrace.c:132 show_stack+0x28/0x34 arch/arm64/kernel/stacktrace.c:196 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x110/0x164 lib/dump_stack.c:118 print_address_description+0x78/0x5c8 mm/kasan/report.c:385 __kasan_report mm/kasan/report.c:545 [inline] kasan_report+0x148/0x1e4 mm/kasan/report.c:562 check_memory_region_inline mm/kasan/generic.c:183 [inline] __asan_load8+0xb4/0xbc mm/kasan/generic.c:252 kvm_vm_ioctl_unregister_coalesced_mmio+0x7c/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:183 kvm_vm_ioctl+0xe30/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3755 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739 __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline] invoke_syscall arch/arm64/kernel/syscall.c:48 [inline] el0_svc_common arch/arm64/kernel/syscall.c:158 [inline] do_el0_svc+0x120/0x290 arch/arm64/kernel/syscall.c:220 el0_svc+0x1c/0x28 arch/arm64/kernel/entry-common.c:367 el0_sync_handler+0x98/0x170 arch/arm64/kernel/entry-common.c:383 el0_sync+0x140/0x180 arch/arm64/kernel/entry.S:670 Allocated by task 4269: stack_trace_save+0x80/0xb8 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc+0xdc/0x120 mm/kasan/common.c:461 kasan_kmalloc+0xc/0x14 mm/kasan/common.c:475 kmem_cache_alloc_trace include/linux/slab.h:450 [inline] kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:664 [inline] kvm_vm_ioctl_register_coalesced_mmio+0x78/0x1cc arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:146 kvm_vm_ioctl+0x7e8/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3746 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739 __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline] invoke_syscall arch/arm64/kernel/syscall.c:48 [inline] el0_svc_common arch/arm64/kernel/syscall.c:158 [inline] do_el0_svc+0x120/0x290 arch/arm64/kernel/syscall.c:220 el0_svc+0x1c/0x28 arch/arm64/kernel/entry-common.c:367 el0_sync_handler+0x98/0x170 arch/arm64/kernel/entry-common.c:383 el0_sync+0x140/0x180 arch/arm64/kernel/entry.S:670 Freed by task 4269: stack_trace_save+0x80/0xb8 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_set_track+0x38/0x6c mm/kasan/common.c:56 kasan_set_free_info+0x20/0x40 mm/kasan/generic.c:355 __kasan_slab_free+0x124/0x150 mm/kasan/common.c:422 kasan_slab_free+0x10/0x1c mm/kasan/common.c:431 slab_free_hook mm/slub.c:1544 [inline] slab_free_freelist_hook mm/slub.c:1577 [inline] slab_free mm/slub.c:3142 [inline] kfree+0x104/0x38c mm/slub.c:4124 coalesced_mmio_destructor+0x94/0xa4 arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:102 kvm_iodevice_destructor include/kvm/iodev.h:61 [inline] kvm_io_bus_unregister_dev+0x248/0x280 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:4374 kvm_vm_ioctl_unregister_coalesced_mmio+0x158/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:186 kvm_vm_ioctl+0xe30/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3755 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739 __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline] invoke_syscall arch/arm64/kernel/sys ---truncated---
References
Impacted products
Vendor Product Version
Linux Linux Version: 7d1bc32d6477ff96a32695ea4be8144e4513ab2d
Version: 2a20592baff59c5351c5200ec667e1a2aa22af85
Version: 50cbad42bfea8c052b7ca590bd4126cdc898713c
Version: 5d3c4c79384af06e3c8e25b7770b6247496b4417
Version: 5d3c4c79384af06e3c8e25b7770b6247496b4417
Version: 168e82f640ed1891a700bdb43e37da354b2ab63c
Version: 5.4.119   ≤
Version: 5.10.37   ≤
Version: 5.12.4   ≤
Version: 5.11.21   ≤
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio\n\nBUG: KASAN: use-after-free in kvm_vm_ioctl_unregister_coalesced_mmio+0x7c/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:183\nRead of size 8 at addr ffff0000c03a2500 by task syz-executor083/4269\n\nCPU: 5 PID: 4269 Comm: syz-executor083 Not tainted 5.10.0 #7\nHardware name: linux,dummy-virt (DT)\nCall trace:\n dump_backtrace+0x0/0x2d0 arch/arm64/kernel/stacktrace.c:132\n show_stack+0x28/0x34 arch/arm64/kernel/stacktrace.c:196\n __dump_stack lib/dump_stack.c:77 [inline]\n dump_stack+0x110/0x164 lib/dump_stack.c:118\n print_address_description+0x78/0x5c8 mm/kasan/report.c:385\n __kasan_report mm/kasan/report.c:545 [inline]\n kasan_report+0x148/0x1e4 mm/kasan/report.c:562\n check_memory_region_inline mm/kasan/generic.c:183 [inline]\n __asan_load8+0xb4/0xbc mm/kasan/generic.c:252\n kvm_vm_ioctl_unregister_coalesced_mmio+0x7c/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:183\n kvm_vm_ioctl+0xe30/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3755\n vfs_ioctl fs/ioctl.c:48 [inline]\n __do_sys_ioctl fs/ioctl.c:753 [inline]\n __se_sys_ioctl fs/ioctl.c:739 [inline]\n __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739\n __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline]\n invoke_syscall arch/arm64/kernel/syscall.c:48 [inline]\n el0_svc_common arch/arm64/kernel/syscall.c:158 [inline]\n do_el0_svc+0x120/0x290 arch/arm64/kernel/syscall.c:220\n el0_svc+0x1c/0x28 arch/arm64/kernel/entry-common.c:367\n el0_sync_handler+0x98/0x170 arch/arm64/kernel/entry-common.c:383\n el0_sync+0x140/0x180 arch/arm64/kernel/entry.S:670\n\nAllocated by task 4269:\n stack_trace_save+0x80/0xb8 kernel/stacktrace.c:121\n kasan_save_stack mm/kasan/common.c:48 [inline]\n kasan_set_track mm/kasan/common.c:56 [inline]\n __kasan_kmalloc+0xdc/0x120 mm/kasan/common.c:461\n kasan_kmalloc+0xc/0x14 mm/kasan/common.c:475\n kmem_cache_alloc_trace include/linux/slab.h:450 [inline]\n kmalloc include/linux/slab.h:552 [inline]\n kzalloc include/linux/slab.h:664 [inline]\n kvm_vm_ioctl_register_coalesced_mmio+0x78/0x1cc arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:146\n kvm_vm_ioctl+0x7e8/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3746\n vfs_ioctl fs/ioctl.c:48 [inline]\n __do_sys_ioctl fs/ioctl.c:753 [inline]\n __se_sys_ioctl fs/ioctl.c:739 [inline]\n __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739\n __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline]\n invoke_syscall arch/arm64/kernel/syscall.c:48 [inline]\n el0_svc_common arch/arm64/kernel/syscall.c:158 [inline]\n do_el0_svc+0x120/0x290 arch/arm64/kernel/syscall.c:220\n el0_svc+0x1c/0x28 arch/arm64/kernel/entry-common.c:367\n el0_sync_handler+0x98/0x170 arch/arm64/kernel/entry-common.c:383\n el0_sync+0x140/0x180 arch/arm64/kernel/entry.S:670\n\nFreed by task 4269:\n stack_trace_save+0x80/0xb8 kernel/stacktrace.c:121\n kasan_save_stack mm/kasan/common.c:48 [inline]\n kasan_set_track+0x38/0x6c mm/kasan/common.c:56\n kasan_set_free_info+0x20/0x40 mm/kasan/generic.c:355\n __kasan_slab_free+0x124/0x150 mm/kasan/common.c:422\n kasan_slab_free+0x10/0x1c mm/kasan/common.c:431\n slab_free_hook mm/slub.c:1544 [inline]\n slab_free_freelist_hook mm/slub.c:1577 [inline]\n slab_free mm/slub.c:3142 [inline]\n kfree+0x104/0x38c mm/slub.c:4124\n coalesced_mmio_destructor+0x94/0xa4 arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:102\n kvm_iodevice_destructor include/kvm/iodev.h:61 [inline]\n kvm_io_bus_unregister_dev+0x248/0x280 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:4374\n kvm_vm_ioctl_unregister_coalesced_mmio+0x158/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:186\n kvm_vm_ioctl+0xe30/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3755\n vfs_ioctl fs/ioctl.c:48 [inline]\n __do_sys_ioctl fs/ioctl.c:753 [inline]\n __se_sys_ioctl fs/ioctl.c:739 [inline]\n __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739\n __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline]\n invoke_syscall arch/arm64/kernel/sys\n---truncated---"
        }
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      "metrics": [
        {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Reachable only via local host ioctls on /dev/kvm (KVM_CREATE_VM then KVM_REGISTER/UNREGISTER_COALESCED_MMIO through kvm_vm_ioctl); not via network packets or unaided guest MMIO.\nAC:L - The attacker fully controls zone registration/unregistration and can reliably force the GFP_KERNEL_ACCOUNT kmalloc failure in kvm_io_bus_unregister_dev (e.g. memcg/memory pressure) that triggers the UAF path.\nPR:L - The ioctl path has no capable() check; access needs only /dev/kvm permissions (kvm group or seat uaccess), which is unprivileged device access rather than init-namespace root.\nUI:N - The attacker triggers the bug directly with their own KVM ioctls; no separate victim action is required.\nS:U - This is host userspace (VMM) corrupting host kernel state via the KVM ioctl interface, not a guest-to-host escape across a VM security boundary.\nC:H - KASAN-confirmed use-after-free of kvm_coalesced_mmio_dev heap objects; freed objects can be reallocated/sprayed to obtain arbitrary kernel memory disclosure.\nI:H - UAF/double-free of IO-bus device objects enables heap corruption and write primitives that can hijack kernel control flow.\nA:H - Dereferencing freed coalesced-MMIO list/device objects causes kernel oops/panic, and UAF paths remain crashable even without full exploitation."
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    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47341",
    "datePublished": "2024-05-21T14:35:49.001Z",
    "dateReserved": "2024-05-21T14:28:16.979Z",
    "dateUpdated": "2026-08-05T08:47:18.943Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f2ff9d03432fcb160e9f7d4be26174d89de2779a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/679837dc0abaa2c6e2a7bcd86483e05eee1d5066\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/8d7c539316d652d217e5e82b89ee204c812a7061\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/069d44a24c0ff8f85adf49233aae7a8ca16f5c7e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/23fa2e46a5556f787ce2ea1a315d3ab93cced204\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:08.601Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47341\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:38:50.302115Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:18.923Z\"}}], \"cna\": {\"title\": \"KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - Reachable only via local host ioctls on /dev/kvm (KVM_CREATE_VM then KVM_REGISTER/UNREGISTER_COALESCED_MMIO through kvm_vm_ioctl); not via network packets or unaided guest MMIO.\\nAC:L - The attacker fully controls zone registration/unregistration and can reliably force the GFP_KERNEL_ACCOUNT kmalloc failure in kvm_io_bus_unregister_dev (e.g. memcg/memory pressure) that triggers the UAF path.\\nPR:L - The ioctl path has no capable() check; access needs only /dev/kvm permissions (kvm group or seat uaccess), which is unprivileged device access rather than init-namespace root.\\nUI:N - The attacker triggers the bug directly with their own KVM ioctls; no separate victim action is required.\\nS:U - This is host userspace (VMM) corrupting host kernel state via the KVM ioctl interface, not a guest-to-host escape across a VM security boundary.\\nC:H - KASAN-confirmed use-after-free of kvm_coalesced_mmio_dev heap objects; freed objects can be reallocated/sprayed to obtain arbitrary kernel memory disclosure.\\nI:H - UAF/double-free of IO-bus device objects enables heap corruption and write primitives that can hijack kernel control flow.\\nA:H - Dereferencing freed coalesced-MMIO list/device objects causes kernel oops/panic, and UAF paths remain crashable even without full exploitation.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"7d1bc32d6477ff96a32695ea4be8144e4513ab2d\", \"lessThan\": \"f2ff9d03432fcb160e9f7d4be26174d89de2779a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a20592baff59c5351c5200ec667e1a2aa22af85\", \"lessThan\": \"679837dc0abaa2c6e2a7bcd86483e05eee1d5066\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"50cbad42bfea8c052b7ca590bd4126cdc898713c\", \"lessThan\": \"8d7c539316d652d217e5e82b89ee204c812a7061\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5d3c4c79384af06e3c8e25b7770b6247496b4417\", \"lessThan\": \"069d44a24c0ff8f85adf49233aae7a8ca16f5c7e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5d3c4c79384af06e3c8e25b7770b6247496b4417\", \"lessThan\": \"23fa2e46a5556f787ce2ea1a315d3ab93cced204\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"168e82f640ed1891a700bdb43e37da354b2ab63c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5.4.119\", \"lessThan\": \"5.4.134\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.10.37\", \"lessThan\": \"5.10.52\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.12.4\", \"lessThan\": \"5.12.19\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.11.21\", \"lessThan\": \"5.12\", \"versionType\": \"semver\"}], \"programFiles\": [\"virt/kvm/coalesced_mmio.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.13\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.13\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.134\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.52\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.19\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.13.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"virt/kvm/coalesced_mmio.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f2ff9d03432fcb160e9f7d4be26174d89de2779a\"}, {\"url\": \"https://git.kernel.org/stable/c/679837dc0abaa2c6e2a7bcd86483e05eee1d5066\"}, {\"url\": \"https://git.kernel.org/stable/c/8d7c539316d652d217e5e82b89ee204c812a7061\"}, {\"url\": \"https://git.kernel.org/stable/c/069d44a24c0ff8f85adf49233aae7a8ca16f5c7e\"}, {\"url\": \"https://git.kernel.org/stable/c/23fa2e46a5556f787ce2ea1a315d3ab93cced204\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nKVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio\\n\\nBUG: KASAN: use-after-free in kvm_vm_ioctl_unregister_coalesced_mmio+0x7c/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:183\\nRead of size 8 at addr ffff0000c03a2500 by task syz-executor083/4269\\n\\nCPU: 5 PID: 4269 Comm: syz-executor083 Not tainted 5.10.0 #7\\nHardware name: linux,dummy-virt (DT)\\nCall trace:\\n dump_backtrace+0x0/0x2d0 arch/arm64/kernel/stacktrace.c:132\\n show_stack+0x28/0x34 arch/arm64/kernel/stacktrace.c:196\\n __dump_stack lib/dump_stack.c:77 [inline]\\n dump_stack+0x110/0x164 lib/dump_stack.c:118\\n print_address_description+0x78/0x5c8 mm/kasan/report.c:385\\n __kasan_report mm/kasan/report.c:545 [inline]\\n kasan_report+0x148/0x1e4 mm/kasan/report.c:562\\n check_memory_region_inline mm/kasan/generic.c:183 [inline]\\n __asan_load8+0xb4/0xbc mm/kasan/generic.c:252\\n kvm_vm_ioctl_unregister_coalesced_mmio+0x7c/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:183\\n kvm_vm_ioctl+0xe30/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3755\\n vfs_ioctl fs/ioctl.c:48 [inline]\\n __do_sys_ioctl fs/ioctl.c:753 [inline]\\n __se_sys_ioctl fs/ioctl.c:739 [inline]\\n __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739\\n __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline]\\n invoke_syscall arch/arm64/kernel/syscall.c:48 [inline]\\n el0_svc_common arch/arm64/kernel/syscall.c:158 [inline]\\n do_el0_svc+0x120/0x290 arch/arm64/kernel/syscall.c:220\\n el0_svc+0x1c/0x28 arch/arm64/kernel/entry-common.c:367\\n el0_sync_handler+0x98/0x170 arch/arm64/kernel/entry-common.c:383\\n el0_sync+0x140/0x180 arch/arm64/kernel/entry.S:670\\n\\nAllocated by task 4269:\\n stack_trace_save+0x80/0xb8 kernel/stacktrace.c:121\\n kasan_save_stack mm/kasan/common.c:48 [inline]\\n kasan_set_track mm/kasan/common.c:56 [inline]\\n __kasan_kmalloc+0xdc/0x120 mm/kasan/common.c:461\\n kasan_kmalloc+0xc/0x14 mm/kasan/common.c:475\\n kmem_cache_alloc_trace include/linux/slab.h:450 [inline]\\n kmalloc include/linux/slab.h:552 [inline]\\n kzalloc include/linux/slab.h:664 [inline]\\n kvm_vm_ioctl_register_coalesced_mmio+0x78/0x1cc arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:146\\n kvm_vm_ioctl+0x7e8/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3746\\n vfs_ioctl fs/ioctl.c:48 [inline]\\n __do_sys_ioctl fs/ioctl.c:753 [inline]\\n __se_sys_ioctl fs/ioctl.c:739 [inline]\\n __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739\\n __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline]\\n invoke_syscall arch/arm64/kernel/syscall.c:48 [inline]\\n el0_svc_common arch/arm64/kernel/syscall.c:158 [inline]\\n do_el0_svc+0x120/0x290 arch/arm64/kernel/syscall.c:220\\n el0_svc+0x1c/0x28 arch/arm64/kernel/entry-common.c:367\\n el0_sync_handler+0x98/0x170 arch/arm64/kernel/entry-common.c:383\\n el0_sync+0x140/0x180 arch/arm64/kernel/entry.S:670\\n\\nFreed by task 4269:\\n stack_trace_save+0x80/0xb8 kernel/stacktrace.c:121\\n kasan_save_stack mm/kasan/common.c:48 [inline]\\n kasan_set_track+0x38/0x6c mm/kasan/common.c:56\\n kasan_set_free_info+0x20/0x40 mm/kasan/generic.c:355\\n __kasan_slab_free+0x124/0x150 mm/kasan/common.c:422\\n kasan_slab_free+0x10/0x1c mm/kasan/common.c:431\\n slab_free_hook mm/slub.c:1544 [inline]\\n slab_free_freelist_hook mm/slub.c:1577 [inline]\\n slab_free mm/slub.c:3142 [inline]\\n kfree+0x104/0x38c mm/slub.c:4124\\n coalesced_mmio_destructor+0x94/0xa4 arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:102\\n kvm_iodevice_destructor include/kvm/iodev.h:61 [inline]\\n kvm_io_bus_unregister_dev+0x248/0x280 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:4374\\n kvm_vm_ioctl_unregister_coalesced_mmio+0x158/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:186\\n kvm_vm_ioctl+0xe30/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3755\\n vfs_ioctl fs/ioctl.c:48 [inline]\\n __do_sys_ioctl fs/ioctl.c:753 [inline]\\n __se_sys_ioctl fs/ioctl.c:739 [inline]\\n __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739\\n __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline]\\n invoke_syscall arch/arm64/kernel/sys\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.134\", \"versionStartIncluding\": \"5.4.119\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.52\", \"versionStartIncluding\": \"5.10.37\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.19\", \"versionStartIncluding\": \"5.12.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13.4\", \"versionStartIncluding\": \"5.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14\", \"versionStartIncluding\": \"5.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.11.21\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:47:18.943Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47341\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:47:18.943Z\", \"dateReserved\": \"2024-05-21T14:28:16.979Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:35:49.001Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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