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CVE-2021-47142

nvd nist
Published: Mar 25, 2024Modified: Jun 17, 2026

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5.5
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploitability: 1.8 / Impact: 3.6
Source: NVD

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix a use-after-free looks like we forget to set ttm->sg to NULL. Hit panic below [ 1235.844104] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI [ 1235.989074] Call Trace: [ 1235.991751] sg_free_table+0x17/0x20 [ 1235.995667] amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu] [ 1236.002288] amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu] [ 1236.008464] ttm_tt_destroy+0x1e/0x30 [ttm] [ 1236.013066] ttm_bo_cleanup_memtype_use+0x51/0xa0 [ttm] [ 1236.018783] ttm_bo_release+0x262/0xa50 [ttm] [ 1236.023547] ttm_bo_put+0x82/0xd0 [ttm] [ 1236.027766] amdgpu_bo_unref+0x26/0x50 [amdgpu] [ 1236.032809] amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu] [ 1236.040400] kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu] [ 1236.046912] kfd_ioctl+0x463/0x690 [amdgpu]

Affected (9)

Products: Linux: Linux Kernel
Linux
1 product
Linux Kernel
Configuration A
9 vulnerable
Vulnerable SoftwareAffected Versions
Linux
Linux Kernel
Before 4.4.271
Linux Kernel
From 4.14.0 to 4.14.235
Linux Kernel
From 4.19.0 to 4.19.193
Linux Kernel
From 4.9.0 to 4.9.271
Linux Kernel
From 5.10.0 to 5.10.42
Linux Kernel
From 5.12.0 to 5.12.9
Linux Kernel
From 5.4.0 to 5.4.124
Linux Kernel
Version 5.13 rc1
Linux Kernel
Version 5.13 rc2

Related CWEs

CWE-416
Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (16)

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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Source: af854a3a-2127-422b-91ae-364da2661108
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Source: af854a3a-2127-422b-91ae-364da2661108
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Source: af854a3a-2127-422b-91ae-364da2661108
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Source: af854a3a-2127-422b-91ae-364da2661108
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Source: af854a3a-2127-422b-91ae-364da2661108
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Source: af854a3a-2127-422b-91ae-364da2661108
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Source: af854a3a-2127-422b-91ae-364da2661108
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Source: af854a3a-2127-422b-91ae-364da2661108
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Timeline

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