CVE-2026-68102
drm/amdgpu: fix aperture mapping leak
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix aperture mapping leak amdgpu_pci_remove() calls drm_dev_unplug() before invoking the driver fini routines. This causes drm_dev_enter() in amdgpu_ttm_fini() to always return false, so iounmap(aper_base_kaddr) never runs on normal driver unload, leaving an orphaned entry in the x86 PAT interval tree. On connected_to_cpu hardware, the aperture is mapped write-back (WB) via ioremap_cache(). On reload, IP discovery calls memremap(..., MEMREMAP_WC) over the same range. The WC vs WB conflict causes: ioremap error for 0x..., requested 0x1, got 0x0 amdgpu: discovery failed: -2 Fix by switching to devres-managed mappings so cleanup is guaranteed regardless of drm_dev_enter() state: - connected_to_cpu path: devm_memremap(MEMREMAP_WB). For IORESOURCE_SYSTEM_RAM ranges this takes the try_ram_remap() shortcut, returning __va(offset) from the existing kernel direct map. No new ioremap VA or PAT entry is created, so there is nothing to orphan. - dGPU path: devm_ioremap_wc() registers iounmap() as a devres action, guaranteeing cleanup at device_del() time. Also remove iounmap(aper_base_kaddr) from amdgpu_device_unmap_mmio() since the mapping is now devres-owned. v2: Remove redundant x86_64 guard (Lijo) (cherry picked from commit d871e99879cb5fd1fa798b006b4888887e63a17a)
INFO
Published Date :
Aug. 10, 2026, 1:19 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Use devm_memremap() for connected_to_cpu path.
- Use devm_ioremap_wc() for dGPU path.
- Ensure cleanup at device_del() time.
- Remove redundant iounmap() call.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68102.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68102 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68102
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68102 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68102 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': '67bc3647e418e23dc0d17604bdba634a73de809f', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': 'a343d028ad6c174da8dc6af560c51e6d140a6727', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': '6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': 'f5988b5c300a32ff751724ffd33d5a8d5873e4a7', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': 'ea772a440d56b285f4d491affac50ecd41f6b402', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/amd/amdgpu/amdgpu_device.c', 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/amd/amdgpu/amdgpu_device.c', 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': '67bc3647e418e23dc0d17604bdba634a73de809f', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': 'a343d028ad6c174da8dc6af560c51e6d140a6727', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': '6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': 'f5988b5c300a32ff751724ffd33d5a8d5873e4a7', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': 'ea772a440d56b285f4d491affac50ecd41f6b402', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/amd/amdgpu/amdgpu_device.c', 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/amd/amdgpu/amdgpu_device.c', 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': '67bc3647e418e23dc0d17604bdba634a73de809f', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': 'a343d028ad6c174da8dc6af560c51e6d140a6727', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': '6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': 'f5988b5c300a32ff751724ffd33d5a8d5873e4a7', 'versionType': 'git'}, {'status': 'affected', 'version': '9d0af8b4def0de6b734ec8db08e96da0458facb6', 'lessThan': 'ea772a440d56b285f4d491affac50ecd41f6b402', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/amd/amdgpu/amdgpu_device.c', 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/amd/amdgpu/amdgpu_device.c', 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix aperture mapping leak amdgpu_pci_remove() calls drm_dev_unplug() before invoking the driver fini routines. This causes drm_dev_enter() in amdgpu_ttm_fini() to always return false, so iounmap(aper_base_kaddr) never runs on normal driver unload, leaving an orphaned entry in the x86 PAT interval tree. On connected_to_cpu hardware, the aperture is mapped write-back (WB) via ioremap_cache(). On reload, IP discovery calls memremap(..., MEMREMAP_WC) over the same range. The WC vs WB conflict causes: ioremap error for 0x..., requested 0x1, got 0x0 amdgpu: discovery failed: -2 Fix by switching to devres-managed mappings so cleanup is guaranteed regardless of drm_dev_enter() state: - connected_to_cpu path: devm_memremap(MEMREMAP_WB). For IORESOURCE_SYSTEM_RAM ranges this takes the try_ram_remap() shortcut, returning __va(offset) from the existing kernel direct map. No new ioremap VA or PAT entry is created, so there is nothing to orphan. - dGPU path: devm_ioremap_wc() registers iounmap() as a devres action, guaranteeing cleanup at device_del() time. Also remove iounmap(aper_base_kaddr) from amdgpu_device_unmap_mmio() since the mapping is now devres-owned. v2: Remove redundant x86_64 guard (Lijo) (cherry picked from commit d871e99879cb5fd1fa798b006b4888887e63a17a) Added Reference https://git.kernel.org/stable/c/6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa Added Reference https://git.kernel.org/stable/c/67bc3647e418e23dc0d17604bdba634a73de809f Added Reference https://git.kernel.org/stable/c/a343d028ad6c174da8dc6af560c51e6d140a6727 Added Reference https://git.kernel.org/stable/c/ea772a440d56b285f4d491affac50ecd41f6b402 Added Reference https://git.kernel.org/stable/c/f5988b5c300a32ff751724ffd33d5a8d5873e4a7