1. Home
  2. Vulnerabilities
  3. CVE-2026-74447
7.8
HIGH CVSS 3.1
CVE-2026-74447
drm/amdkfd: fix uint32_t overflow in EOP ring buffer size alignment
Overview
Description

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)

Details
INFO

Published Date :

Aug. 15, 2026, 1:17 p.m.

Last Modified :

Aug. 17, 2026, 6:19 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-74447 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Address uint32_t overflow in EOP ring buffer size alignment calculation to prevent GPU faults.
  • Cast operand to u64 for alignment calculation.
  • Ensure size check rejects oversized requests.
References
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-2026-74447.

URL Resource
https://git.kernel.org/stable/c/273548eb997c6be85230c1236b18784b09f6203c
https://git.kernel.org/stable/c/6dc0b4b39ed4f11ef70f76ecea8537e35f45342b
https://git.kernel.org/stable/c/7c54bd225d83bc1bcb44430ed4b4d3a5c36b1961
https://git.kernel.org/stable/c/83463a96ea3c7d8ae636a4d6a0ba63c9ce410724
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-74447 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-2026-74447 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-2026-74447 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-74447 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
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Affected [{'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-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/amd/amdkfd/kfd_queue.c'], 'defaultStatus': 'affected'}] [{'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'}]
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 15, 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': '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-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/amd/amdkfd/kfd_queue.c'], 'defaultStatus': 'affected'}]
    Added Description 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)
    Added Reference https://git.kernel.org/stable/c/273548eb997c6be85230c1236b18784b09f6203c
    Added Reference https://git.kernel.org/stable/c/6dc0b4b39ed4f11ef70f76ecea8537e35f45342b
    Added Reference https://git.kernel.org/stable/c/7c54bd225d83bc1bcb44430ed4b4d3a5c36b1961
    Added Reference https://git.kernel.org/stable/c/83463a96ea3c7d8ae636a4d6a0ba63c9ce410724
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact