CVE-2023-53545
Modified Modified - Updated After Analysis
BaseFortify

Publication date: 2025-10-04

Last updated on: 2026-06-01

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: unmap and remove csa_va properly Root PD BO should be reserved before unmap and remove a bo_va from VM otherwise lockdep will complain. v2: check fpriv->csa_va is not NULL instead of amdgpu_mcbp (christian) [14616.936827] WARNING: CPU: 6 PID: 1711 at drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c:1762 amdgpu_vm_bo_del+0x399/0x3f0 [amdgpu] [14616.937096] Call Trace: [14616.937097] <TASK> [14616.937102] amdgpu_driver_postclose_kms+0x249/0x2f0 [amdgpu] [14616.937187] drm_file_free+0x1d6/0x300 [drm] [14616.937207] drm_close_helper.isra.0+0x62/0x70 [drm] [14616.937220] drm_release+0x5e/0x100 [drm] [14616.937234] __fput+0x9f/0x280 [14616.937239] ____fput+0xe/0x20 [14616.937241] task_work_run+0x61/0x90 [14616.937246] exit_to_user_mode_prepare+0x215/0x220 [14616.937251] syscall_exit_to_user_mode+0x2a/0x60 [14616.937254] do_syscall_64+0x48/0x90 [14616.937257] entry_SYSCALL_64_after_hwframe+0x63/0xcd
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Meta Information
Published
2025-10-04
Last Modified
2026-06-01
Generated
2026-06-16
AI Q&A
2025-10-04
EPSS Evaluated
2026-06-15
NVD
CVE-2023-53545
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 4.2 (inc) to 6.4.12 (exc)
Helpful Resources
Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel's AMD GPU driver (amdgpu) involves improper handling of unmapping and removing a buffer object virtual address (bo_va) from the virtual memory (VM). Specifically, the Root Page Directory Buffer Object (Root PD BO) should be reserved before unmapping and removing a bo_va; failure to do so causes lockdep (a kernel locking correctness validator) to raise warnings. The issue was fixed by ensuring proper reservation and checking that a certain pointer (fpriv->csa_va) is not NULL before proceeding.

Impact Analysis

The vulnerability can cause kernel warnings related to locking issues (lockdep complaints), which may lead to instability or unexpected behavior in the AMD GPU driver within the Linux kernel. This could potentially affect system stability or GPU-related operations, especially when closing or releasing GPU resources.

Detection Guidance

You can detect this vulnerability by checking your system logs for warning messages related to the amdgpu driver, specifically messages like: "WARNING: CPU: ... at drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c:1762 amdgpu_vm_bo_del". Use the command 'dmesg | grep amdgpu' or 'journalctl -k | grep amdgpu' to search for such warnings in kernel logs.

Mitigation Strategies

Immediate mitigation involves updating the Linux kernel to a version where this vulnerability is resolved, as it relates to proper unmapping and removal of csa_va in the amdgpu driver. Until then, monitor system logs for related warnings and avoid workloads that heavily use the amdgpu driver to reduce risk.

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