CVE-2021-47341— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于内存释放后重用。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 17
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 7d1bc32d6477ff96a32695ea4be8144e4513ab2d< f2ff9d03432fcb160e9f7d4be26174d89de2779a |
affected |
2a20592baff59c5351c5200ec667e1a2aa22af85< 679837dc0abaa2c6e2a7bcd86483e05eee1d5066 |
affected | ||
50cbad42bfea8c052b7ca590bd4126cdc898713c< 8d7c539316d652d217e5e82b89ee204c812a7061 |
affected | ||
5d3c4c79384af06e3c8e25b7770b6247496b4417< 069d44a24c0ff8f85adf49233aae7a8ca16f5c7e |
affected | ||
5d3c4c79384af06e3c8e25b7770b6247496b4417< 23fa2e46a5556f787ce2ea1a315d3ab93cced204 |
affected | ||
168e82f640ed1891a700bdb43e37da354b2ab63c |
affected | ||
5.4.119< 5.4.134 |
affected | ||
5.10.37< 5.10.52 |
affected | ||
| … +9 条更多 | |||
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一、 漏洞 CVE-2021-47341 基础信息
漏洞信息
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Vulnerability Title
KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio
来源: CVE Program / CVE List V5
Vulnerability Description
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---
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于内存释放后重用。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2021-47341 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2021-47341 其他参考 (5)
同批安全公告 · Linux · 2024-05-21 · 共 361 条
| CVE-2023-52732 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-52755 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47378 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47328 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47232 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-52741 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47427 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47308 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52776 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47388 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52801 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52798 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47390 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52769 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52846 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52790 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47240 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47352 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52829 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47244 | 8.2 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 361 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2021-47341
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