drm/amdkfd: fix uint32_t overflow in EOP ring buffer size alignment
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix uint32_t overflow in EOP ring buffer size alignment eop_ring_buffer_size in struct queue_properties is a u32. In kfd_queue_acquire_buffers() the expected EOP buffer size is computed as ALIGN(eop_ring_buffer_size, PAGE_SIZE); ALIGN uses typeof(x), so the addition is done in 32-bit. A user-supplied size of 0xFFFFF001 wraps to 0, causing kfd_queue_buffer_get() to skip its exact-size check (gated on size != 0) and accept any BO mapped at the address. On GFX8/GFX9 the MQD cp_hqd_eop_control is then programmed for an 8KB EOP ring backed by a 4KB BO, so CP EOP writes can land past the buffer and fault the GPU. Cast the operand to u64 so the alignment is computed in 64-bit; the size check in kfd_queue_buffer_get() then rejects the oversized request. (cherry picked from commit ae443117b742c357bfef3a7bddabf76fcf86e9ef)
CVE-2026-74447
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-2026-74447
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": "ee0dc6c66a913260311876a4b2b53fe0b9bc3f94",
"lessThan": "273548eb997c6be85230c1236b18784b09f6203c",
"versionType": "git"
},
{
"status": "affected",
"version": "acfc84cfa70aca5b970faf152979bc97b9f8b0c0",
"lessThan": "6dc0b4b39ed4f11ef70f76ecea8537e35f45342b",
"versionType": "git"
},
{
"status": "affected",
"version": "42ea9cf2f16b7131cb7302acb3dac510968f8bdc",
"lessThan": "7c54bd225d83bc1bcb44430ed4b4d3a5c36b1961",
"versionType": "git"
},
{
"status": "affected",
"version": "42ea9cf2f16b7131cb7302acb3dac510968f8bdc",
"lessThan": "83463a96ea3c7d8ae636a4d6a0ba63c9ce410724",
"versionType": "git"
},
{
"status": "affected",
"version": "c6ce687077cc67e4f3cbd0c89cb356fbbce91f4c",
"versionType": "git"
},
{
"status": "affected",
"version": "6.12.75",
"lessThan": "6.12.103",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.16",
"lessThan": "6.18.44",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.19.6",
"lessThan": "6.20",
"versionType": "semver"
}
],
"programFiles": [
"drivers/gpu/drm/amd/amdkfd/kfd_queue.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/amd/amdkfd/kfd_queue.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74447
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33156 · Revision 1
- Added to Heist Feed
- Publisher date