Use After Free Affecting kernel package, versions <0:4.14.238-182.421.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNEL-7919046
- published 6 Sep 2024
- disclosed 25 Mar 2024
Introduced: 25 Mar 2024
CVE-2021-47142 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.238-182.421.amzn2 or higher.
This issue was patched in ALAS2-2021-1685.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
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]
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47142
- https://git.kernel.org/stable/c/0707c3fea8102d211631ba515ef2159707561b0d
- https://git.kernel.org/stable/c/1e5c37385097c35911b0f8a0c67ffd10ee1af9a2
- https://git.kernel.org/stable/c/3293cf3513d69f00c14d43e2020826d45ea0e46a
- https://git.kernel.org/stable/c/7398c2aab4da960761ec182d04d6d5abbb4a226e
- https://git.kernel.org/stable/c/952ab3f9f48eb0e8050596d41951cf516be6b122
- https://git.kernel.org/stable/c/a849e218556f932576c0fb1c5a88714b61709a17
- https://git.kernel.org/stable/c/d4ea141fd4b40636a8326df5a377d9c5cf9b3faa
- https://git.kernel.org/stable/c/f98cdf084405333ee2f5be548a91b2d168e49276