CVE-2021-47142

drm/amdgpu: Fix a use-after-free

MEDIUM

5.5

CVSS Score

Published: March 25, 2024 at 09:07 AM UTC

Updated: August 5, 2026 at 09:24 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

v < 4.4.2714.14.0 ≤ v < 4.14.2354.19.0 ≤ v < 4.19.1934.2 ≤ v < 4.14.2354.2 ≤ v < 4.19.1934.2 ≤ v < 4.4.2714.2 ≤ v < 4.9.2714.2 ≤ v < 5.10.424.2 ≤ v < 5.12.94.2 ≤ v < 5.134.2 ≤ v < 5.4.1244.9.0 ≤ v < 4.9.2715.10.0 ≤ v < 5.10.425.12.0 ≤ v < 5.12.95.4.0 ≤ v < 5.4.1245.13 rc1 5.13 rc2d38ceaf99ed015f2a0b9af3499791bd3a3daae21

Vendor states this is fixed in 0707c3fea8102d211631ba515ef2159707561b0d (fixed)

Vendor states this is fixed in 1e5c37385097c35911b0f8a0c67ffd10ee1af9a2 (fixed)

Vendor states this is fixed in 3293cf3513d69f00c14d43e2020826d45ea0e46a (fixed)

Vendor states this is fixed in 7398c2aab4da960761ec182d04d6d5abbb4a226e (fixed)

Vendor states this is fixed in 952ab3f9f48eb0e8050596d41951cf516be6b122 (fixed)

Vendor states this is fixed in a849e218556f932576c0fb1c5a88714b61709a17 (fixed)

Vendor states this is fixed in d4ea141fd4b40636a8326df5a377d9c5cf9b3faa (fixed)

Vendor states this is fixed in f98cdf084405333ee2f5be548a91b2d168e49276 (fixed)

Vendor states this is fixed in 4.14.235 (unaffected)

Vendor states this is fixed in 4.19.193 (unaffected)

Vendor states this is fixed in 4.2 (unaffected)

Vendor states this is fixed in 4.4.271 (unaffected)