In the Linux kernel, the following vulnerability has been resolved:
drm/xe: Add bounds check on pat_index to prevent OOB kernel read in madvise
When user provides a bogus pat_index value through the madvise IOCTL, the
xe_pat_index_get_coh_mode() function performs an array access without
validating bounds. This allows a malicious user to trigger an out-of-bounds
kernel read from the xe->pat.table array.
The vulnerability exists because the validation in madvise_args_are_sane()
directly calls xe_pat_index_get_coh_mode(xe, args->pat_index.val) without
first checking if pat_index is within [0, xe->pat.n_entries).
Although xe_pat_index_get_coh_mode() has a WARN_ON to catch this in debug
builds, it still performs the unsafe array access in production kernels.
v2(Matthew Auld)
- Using array_index_nospec() to mitigate spectre attacks when the value
is used
v3(Matthew Auld)
- Put the declarations at the start of the block
(cherry picked from commit 944a3329b05510d55c69c2ef455136e2fc02de29)
References
Configurations
Configuration 1 (hide)
|
History
08 May 2026, 19:04
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| References | () https://git.kernel.org/stable/c/79f52655567a6471ff3d0d6325ede91bb14461f4 - Patch | |
| References | () https://git.kernel.org/stable/c/fbbe32618e97eff81577a01eb7d9adcd64a216d7 - Patch | |
| References | () https://git.kernel.org/stable/c/ffba51100ff61792fefbae11ca38ac1987a818dd - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-125 |
08 May 2026, 13:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
06 May 2026, 12:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-06 12:16
Updated : 2026-05-08 19:04
NVD link : CVE-2026-43280
Mitre link : CVE-2026-43280
CVE.ORG link : CVE-2026-43280
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read