In the Linux kernel, the following vulnerability has been resolved:
drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise
Add validation in xe_vm_madvise_ioctl() to reject PAT indices with
XE_COH_NONE coherency mode when applied to CPU cached memory.
Using coh_none with CPU cached buffers is a security issue. When the
kernel clears pages before reallocation, the clear operation stays in
CPU cache (dirty). GPU with coh_none can bypass CPU caches and read
stale sensitive data directly from DRAM, potentially leaking data from
previously freed pages of other processes.
This aligns with the existing validation in vm_bind path
(xe_vm_bind_ioctl_validate_bo).
v2(Matthew brost)
- Add fixes
- Move one debug print to better place
v3(Matthew Auld)
- Should be drm/xe/uapi
- More Cc
v4(Shuicheng Lin)
- Fix kmem leak issues by the way
v5
- Remove kmem leak because it has been merged by another patch
v6
- Remove the fix which is not related to current fix
v7
- No change
v8
- Rebase
v9
- Limit the restrictions to iGPU
v10
- No change
(cherry picked from commit 016ccdb674b8c899940b3944952c96a6a490d10a)
References
| Link | Resource |
|---|---|
| https://git.kernel.org/stable/c/4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39 | Patch |
| https://git.kernel.org/stable/c/87f9b1528e1ffc1da3615d552c9a06aba5e20b00 | Patch |
| https://git.kernel.org/stable/c/fea04cf6f2345bc50f15b6638906c35962b89424 | Patch |
| https://access.redhat.com/security/cve/CVE-2026-46309 | Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2486468 | Third Party Advisory |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46309.json | Third Party Advisory |
Configurations
Configuration 1 (hide)
|
History
08 Jul 2026, 14:52
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-401 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39 - Patch | |
| References | () https://git.kernel.org/stable/c/87f9b1528e1ffc1da3615d552c9a06aba5e20b00 - Patch | |
| References | () https://git.kernel.org/stable/c/fea04cf6f2345bc50f15b6638906c35962b89424 - Patch | |
| References | () https://access.redhat.com/security/cve/CVE-2026-46309 - Third Party Advisory | |
| References | () https://bugzilla.redhat.com/show_bug.cgi?id=2486468 - Third Party Advisory | |
| References | () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46309.json - Third Party Advisory |
30 Jun 2026, 03:20
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-524 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.0 |
| References |
|
08 Jun 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-08 17:16
Updated : 2026-07-15 02:22
NVD link : CVE-2026-46309
Mitre link : CVE-2026-46309
CVE.ORG link : CVE-2026-46309
JSON object : View
Products Affected
linux
- linux_kernel