drm/amdkfd: Let driver decide buffer size at AMDKFD_IOC_GET_DMABUF_INFO ioctl
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Let driver decide buffer size at AMDKFD_IOC_GET_DMABUF_INFO ioctl amdkfd driver needs allocate buffer to return bo metadata to user space. The buffer size is controlled by user currently. It is a potential security issue that hostile value (e.g. 2 GiB) lets any render-group user trigger order-MAX allocation/OOM in kernel context. This patch first finds bo metadata size. If the size is smaller than user provided value drive can safely allocate buffer in kernel space and copy to user space buffer. If not, driver will let user know, not allocate and copy. User will redo with new buffer in user space. This patch lets driver decide buffer allocation size to avoid potential hostile size from user space. (cherry picked from commit f54ce9e8cbd3abe0eda3a285f54dc4f572fe589a)
CVE-2026-93823
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-93823
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "1dde0ea95b782425b95455d487cb44991525a1d1",
"lessThan": "d51841bb5ceee75ec3aeeb4e5c51c8e5e7524228",
"versionType": "git"
},
{
"status": "affected",
"version": "1dde0ea95b782425b95455d487cb44991525a1d1",
"lessThan": "a65ccabde6deb95baf9442bd98299e2248884162",
"versionType": "git"
},
{
"status": "affected",
"version": "1dde0ea95b782425b95455d487cb44991525a1d1",
"lessThan": "2d9fd0f01550aab4a0a1984b4379e50545906248",
"versionType": "git"
},
{
"status": "affected",
"version": "1dde0ea95b782425b95455d487cb44991525a1d1",
"lessThan": "8242a8d9d7194d5ef8a8b38a5621ca0966a3ec15",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c",
"drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h",
"drivers/gpu/drm/amd/amdkfd/kfd_chardev.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c",
"drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h",
"drivers/gpu/drm/amd/amdkfd/kfd_chardev.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93823
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #8295 · Revision 1
- Added to Heist Feed
- Publisher date