CVE-2026-43206 Details
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() The kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8 bytes via memset without checking the buffer size parameter. This allows unprivileged userspace to trigger an out-of bounds kernel memory write by passing a small buffer, leading to potential privilege escalation.
A vulnerability in the Linux kernel's handling of AMD KFD (Kernel Fusion Driver) events has been identified, allowing unprivileged userspace to escalate privileges. The issue arises in the 'kfd_event_page_set()' function, which writes a fixed amount of data (KFD_SIGNAL_EVENT_LIMIT * 8 bytes) to a buffer using 'memset'. However, this function does not validate the size of the buffer before writing, creating an opportunity for a memory write that exceeds the allocated bounds. By providing a smaller buffer, an attacker could potentially manipulate kernel memory, leading to unauthorized privilege escalation.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been patched. Instructions for downloading the updated kernel can be found on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/3e04bc310d80b46eaf481f1fefcbcb37a187412d | kernel.org | Patch |
| https://git.kernel.org/stable/c/4857c37c7ba9aa38b9a4c694e8bd8d0091c87940 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4e72f419e4ed44cb3b60506752d8688c20a60a9b | kernel.org | Patch |
| https://git.kernel.org/stable/c/75fb57efdd7863fffbc39db23e9cad7aafda26ed | kernel.org | Patch |
| https://git.kernel.org/stable/c/8a70a26c9f34baea6c3199a9862ddaff4554a96d | kernel.org | Patch |
| https://git.kernel.org/stable/c/b4034442cb090e4a980bdcc1540948606cbc951b | kernel.org | Patch |
| https://git.kernel.org/stable/c/bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b | kernel.org | Patch |
| https://git.kernel.org/stable/c/de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.17, < 5.10.252 >= 5.11, < 5.15.202 >= 5.16, < 6.1.165 >= 6.2, < 6.6.128 >= 6.7, < 6.12.75 >= 6.13, < 6.18.16 >= 6.19, < 6.19.6 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 11, 2026 | Initial Analysis | [email protected] |
| May 8, 2026 | CVE Modified | kernel.org |
| May 6, 2026 | New CVE Received | kernel.org |