CVE-2026-46220

MEDIUM EPSS 2.1%
Published May 28, 20261mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 28, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

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)

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-617

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥4.12  –  <5.10.258
linuxlinux_kernel*≥5.11  –  <5.15.209
linuxlinux_kernel*≥5.16  –  <6.1.175
linuxlinux_kernel*≥6.2  –  <6.6.140
linuxlinux_kernel*≥6.7  –  <6.12.90
linuxlinux_kernel*≥6.13  –  <6.18.32
linuxlinux_kernel*≥6.19  –  <7.0.9
linuxlinux_kernel7.1any
linuxlinux_kernel7.1any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/0b91ea46bb68abf98a082bf239092253bbd6aaa2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/25e7d56a39657d56d1ea6d78992f7ed15dedb412
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78d2e624fa073c14970aa097adcf3ea31c157a66
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a4fd82fb0757c180bf622907397c528b89a827b2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d331fb241a4602253976ddd65144a8ba2b05665d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d4c56932d29773e278be6a65a5384a36c95b89a4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ecaa80318e900ca0c3f687742ede33b41cfd2f8e
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0b91ea46bb68abf98a082bf239092253bbd6aaa2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/25e7d56a39657d56d1ea6d78992f7ed15dedb412
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78d2e624fa073c14970aa097adcf3ea31c157a66
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a4fd82fb0757c180bf622907397c528b89a827b2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d331fb241a4602253976ddd65144a8ba2b05665d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d4c56932d29773e278be6a65a5384a36c95b89a4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ecaa80318e900ca0c3f687742ede33b41cfd2f8e
    Patch