In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission
sdma_v4_0_ring_emit_fence() contains two BUG_ON(addr & 0x3) assertions
that verify fence writeback addresses are dword-aligned. These
assertions can be reached from unprivileged userspace via crafted
DRM_IOCTL_AMDGPU_CS submissions, causing a fatal kernel panic in a
scheduler worker thread.
Replace both BUG_ON() calls with WARN_ON() to log the condition without
crashing the kernel. A misaligned fence address at this point indicates
a driver bug, but crashing the kernel is never the correct response when
the assertion is reachable from userspace.
The CS IOCTL path is the correct place to filter invalid submissions;
the ring emission callback is too late to do anything about it.
(cherry picked from commit b90250bd933afd1ba94d86d6b13821997b22b18e)
References
Configurations
Configuration 1 (hide)
|
History
10 Jun 2026, 18:45
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* |
|
| CWE | CWE-617 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/0b91ea46bb68abf98a082bf239092253bbd6aaa2 - Patch | |
| References | () https://git.kernel.org/stable/c/25e7d56a39657d56d1ea6d78992f7ed15dedb412 - Patch | |
| References | () https://git.kernel.org/stable/c/4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe - Patch | |
| References | () https://git.kernel.org/stable/c/78d2e624fa073c14970aa097adcf3ea31c157a66 - Patch | |
| References | () https://git.kernel.org/stable/c/a4fd82fb0757c180bf622907397c528b89a827b2 - Patch | |
| References | () https://git.kernel.org/stable/c/d331fb241a4602253976ddd65144a8ba2b05665d - Patch | |
| References | () https://git.kernel.org/stable/c/d4c56932d29773e278be6a65a5384a36c95b89a4 - Patch | |
| References | () https://git.kernel.org/stable/c/ecaa80318e900ca0c3f687742ede33b41cfd2f8e - Patch |
01 Jun 2026, 17:17
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
28 May 2026, 10:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-28 10:16
Updated : 2026-06-17 10:53
NVD link : CVE-2026-46220
Mitre link : CVE-2026-46220
CVE.ORG link : CVE-2026-46220
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-617
Reachable Assertion