CVE-2026-93823— drm/amdkfd: Let driver decide buffer size at AMDKFD_IOC_GET_DMABUF_INFO ioctl
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Linux 内核中，已修复以下漏洞： drm/amdkfd：由驱动程序决定在 AMDKFD_IOC_GET_DMABUF_INFO ioctl 调用中的缓冲区大小 amdkfd 驱动程序需要分配缓冲区，以便将缓冲区对象（BO）元数据返回给用户空间。当前，缓冲区大小由用户控制。存在潜在的安全风险：恶意用户可能传入超大值（例如 2 GiB），从而在 kernel 上下文中触发 order-MAX 级别的内存分配或导致系统内存耗尽（OOM），任何属于渲染组的用户均可利用此漏洞。 本补丁首先计算实际所需的 BO 元数据
Possible ATT&CK Techniques 2 AI
T1499 · Endpoint Denial of Service T1203 · Exploitation for Client ExecutionAffected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 1dde0ea95b782425b95455d487cb44991525a1d1< d51841bb5ceee75ec3aeeb4e5c51c8e5e7524228 |
affected |
1dde0ea95b782425b95455d487cb44991525a1d1< a65ccabde6deb95baf9442bd98299e2248884162 |
affected | ||
1dde0ea95b782425b95455d487cb44991525a1d1< 2d9fd0f01550aab4a0a1984b4379e50545906248 |
affected | ||
1dde0ea95b782425b95455d487cb44991525a1d1< 8242a8d9d7194d5ef8a8b38a5621ca0966a3ec15 |
affected | ||
5.0 |
affected | ||
< 5.0 |
unaffected | ||
6.6.158≤ 6.6.* |
unaffected | ||
6.12.111≤ 6.12.* |
unaffected | ||
| … +2 more rows | |||
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I. Basic Information for CVE-2026-93823
Vulnerability Information
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Vulnerability Title
drm/amdkfd: Let driver decide buffer size at AMDKFD_IOC_GET_DMABUF_INFO ioctl
Source: CVE Program / CVE List V5
Vulnerability Description
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)
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-93823
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-93823 (4)
Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total
| CVE-2026-93207 | 9.8 CRITICAL | SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry |
| CVE-2026-97413 | 9.8 CRITICAL | RDMA/rtrs-srv: Fix integer underflow in process_read and process_write |
| CVE-2026-93228 | 9.1 CRITICAL | svcrdma: Reject Write/Reply chunks with segcount 0 |
| CVE-2026-93799 | 8.8 HIGH | wifi: iwlwifi: mvm: validate sta_id in BA window status notif |
| CVE-2026-97442 | 8.8 HIGH | wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi |
| CVE-2026-97409 | 8.8 HIGH | nvme-fc: Do not cancel requests in io target before it is initialized |
| CVE-2026-93806 | 8.8 HIGH | wifi: cfg80211: validate assoc response length before status and IE access |
| CVE-2026-93793 | 8.8 HIGH | wifi: iwlwifi: mvm: validate TX_CMD response layout |
| CVE-2026-93790 | 8.8 HIGH | wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif |
| CVE-2026-93284 | 8.8 HIGH | drm/pagemap: dma-unmap pages before handling migration errors |
| CVE-2026-93280 | 8.8 HIGH | greybus: audio: bound the topology section sizes against the fetched size |
| CVE-2026-97509 | 8.8 HIGH | thunderbolt: Keep XDomain reference during the lifetime of a service |
| CVE-2026-93827 | 8.4 HIGH | virtio-fs: avoid double-free on failed queue setup |
| CVE-2026-97450 | 8.4 HIGH | ACPICA: validate handler object type in two places |
| CVE-2026-97452 | 8.4 HIGH | ACPICA: Prevent adding invalid references |
| CVE-2026-97451 | 8.4 HIGH | ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op) |
| CVE-2026-97455 | 8.4 HIGH | ACPICA: Fix use-after-free in acpi_ds_terminate_control_method() |
| CVE-2026-97433 | 8.2 HIGH | nvme: validate FDP configuration descriptor sizes |
| CVE-2026-93787 | 8.1 HIGH | smb: client: bound dirent name against end of SMB response in cifs_filldir |
| CVE-2026-93786 | 8.1 HIGH | ksmbd: preserve VFS inherited POSIX ACL mask |
Showing top 20 of 234 CVEs. View all on vendor page → →
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Same vendor: Linux
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V. Comments for CVE-2026-93823
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