CVE-2021-47341

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47341
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---

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/069d44a24c0ff8f85adf49233aae7a8ca16f5c7e Patch
https://git.kernel.org/stable/c/23fa2e46a5556f787ce2ea1a315d3ab93cced204 Patch
https://git.kernel.org/stable/c/679837dc0abaa2c6e2a7bcd86483e05eee1d5066 Patch
https://git.kernel.org/stable/c/8d7c539316d652d217e5e82b89ee204c812a7061 Patch
https://git.kernel.org/stable/c/f2ff9d03432fcb160e9f7d4be26174d89de2779a Patch
https://git.kernel.org/stable/c/069d44a24c0ff8f85adf49233aae7a8ca16f5c7e Patch
https://git.kernel.org/stable/c/23fa2e46a5556f787ce2ea1a315d3ab93cced204 Patch
https://git.kernel.org/stable/c/679837dc0abaa2c6e2a7bcd86483e05eee1d5066 Patch
https://git.kernel.org/stable/c/8d7c539316d652d217e5e82b89ee204c812a7061 Patch
https://git.kernel.org/stable/c/f2ff9d03432fcb160e9f7d4be26174d89de2779a Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*
History

14 Jan 2025, 17:28

Type Values Removed Values Added
CWE CWE-416
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/069d44a24c0ff8f85adf49233aae7a8ca16f5c7e - () https://git.kernel.org/stable/c/069d44a24c0ff8f85adf49233aae7a8ca16f5c7e - Patch
References () https://git.kernel.org/stable/c/23fa2e46a5556f787ce2ea1a315d3ab93cced204 - () https://git.kernel.org/stable/c/23fa2e46a5556f787ce2ea1a315d3ab93cced204 - Patch
References () https://git.kernel.org/stable/c/679837dc0abaa2c6e2a7bcd86483e05eee1d5066 - () https://git.kernel.org/stable/c/679837dc0abaa2c6e2a7bcd86483e05eee1d5066 - Patch
References () https://git.kernel.org/stable/c/8d7c539316d652d217e5e82b89ee204c812a7061 - () https://git.kernel.org/stable/c/8d7c539316d652d217e5e82b89ee204c812a7061 - Patch
References () https://git.kernel.org/stable/c/f2ff9d03432fcb160e9f7d4be26174d89de2779a - () https://git.kernel.org/stable/c/f2ff9d03432fcb160e9f7d4be26174d89de2779a - Patch

21 Nov 2024, 06:35

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/069d44a24c0ff8f85adf49233aae7a8ca16f5c7e - () https://git.kernel.org/stable/c/069d44a24c0ff8f85adf49233aae7a8ca16f5c7e -
References () https://git.kernel.org/stable/c/23fa2e46a5556f787ce2ea1a315d3ab93cced204 - () https://git.kernel.org/stable/c/23fa2e46a5556f787ce2ea1a315d3ab93cced204 -
References () https://git.kernel.org/stable/c/679837dc0abaa2c6e2a7bcd86483e05eee1d5066 - () https://git.kernel.org/stable/c/679837dc0abaa2c6e2a7bcd86483e05eee1d5066 -
References () https://git.kernel.org/stable/c/8d7c539316d652d217e5e82b89ee204c812a7061 - () https://git.kernel.org/stable/c/8d7c539316d652d217e5e82b89ee204c812a7061 -
References () https://git.kernel.org/stable/c/f2ff9d03432fcb160e9f7d4be26174d89de2779a - () https://git.kernel.org/stable/c/f2ff9d03432fcb160e9f7d4be26174d89de2779a -
Summary
  • (es) En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: KVM: mmio: Arreglar use-after-free Leer en kvm_vm_ioctl_unregister_coalesced_mmio BUG: KASAN: use-after-free en kvm_vm_ioctl_unregister_coalesced_mmio+0x7c/0x1ec arch/arm64/kvm/../. ./../virt/kvm/coalesced_mmio.c:183 Lectura de tamaño 8 en la dirección ffff0000c03a2500 por tarea syz-executor083/4269 CPU: 5 PID: 4269 Comm: syz-executor083 Not tainted 5.10.0 #7 Nombre de hardware: linux ,dummy-virt (DT) Seguimiento de llamadas: 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 [en línea] 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 [en línea] kasan_report+0x148/0x1e4 mm/kasan /report.c:562 check_memory_region_inline mm/kasan/generic.c:183 [en línea] __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 [ en línea] __do_sys_ioctl fs/ioctl.c:753 [en línea] __se_sys_ioctl fs/ioctl.c:739 [en línea] __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739 __invoke_syscall arch/arm64/kernel/syscall.c:36 [en línea ] invoke_syscall arch/arm64/kernel/syscall.c:48 [en línea] el0_svc_common arch/arm64/kernel/syscall.c:158 [en línea] 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 Asignado por tarea 4269: stack_trace_save+0x80/0xb8 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:48 [en línea] kasan_set_track mm/kasan/common.c:56 [en línea] __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 [en línea] kmalloc include/linux/slab.h:552 [en línea] kzalloc include/linux /slab.h:664 [en línea] 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 [en línea] __do_sys_ioctl fs/ioctl.c:753 [en línea] __se_sys_ioctl fs/ioctl.c:739 [en línea] __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739 __invoke_syscall arch/arm64/kernel/syscall.c:36 [en línea] invoke_syscall arch/arm64/kernel/syscall.c:48 [en línea] el0_svc_common arch/arm64/kernel/syscall .c:158 [en línea] 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 Liberado por la tarea 4269: stack_trace_save+0x80/0xb8 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c :48 [en línea] 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 [en línea] slab_free_freelist_hook mm/slub.c:1577 [en línea] slab_free mm/slub.c:3142 [en línea] 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 [en línea] 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 [en línea] __do_sys_ioctl fs/ioctl .c:753 [en línea] __se_sys_ioctl fs/ioctl.c:739 ---truncado---

21 May 2024, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-21 15:15

Updated : 2025-01-14 17:28

NVD link : CVE-2021-47341

Mitre link : CVE-2021-47341

CVE.ORG link : CVE-2021-47341

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

Use After Free