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Linux KernelOperating system · Linux

CVE-2026-43318

MEDIUM · 5.5 CVSS v3.1 Published 2026-05-08
Fix available
A fix is available. Upgrade to 6.12.75 / 6.18.16 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix sync handling in amdgpu_dma_buf_move_notify Invalidating a dmabuf will impact other users of the shared BO. In the scenario where process A moves the BO, it needs to inform process B about the move and process B will need to update its page table. The commit fixes a synchronisation bug caused by the use of the ticket: it made amdgpu_vm_handle_moved behave as if updating the page table immediately was correct but in this case it's not. An example is the following scenario, with 2 GPUs and glxgears running on GPU0 and Xorg running on GPU1, on a system where P2P PCI isn't supported: glxgears: export linear buffer from GPU0 and import using GPU1 submit frame rendering to GPU0 submit tiled->linear blit Xorg: copy of linear buffer The sequence of jobs would be: drm_sched_job_run # GPU0, frame rendering drm_sched_job_queue # GPU0, blit drm_sched_job_done # GPU0, frame rendering drm_sched_job_run # GPU0, blit move linear buffer for GPU1 access # amdgpu_dma_buf_move_notify -> update pt # GPU0 It this point the blit job on GPU0 is still running and would likely produce a page fault.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 5.7, < 6.12.75>= 6.13, < 6.18.16>= 6.19, < 6.19.6= 7.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.12.75 / 6.18.16 / 6.19.6 or later
Fixed in 6.12.756.18.166.19.6
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel 6.12.75+, 6.18.16+, 6.19.6+, or a version after 7.0 depending on your current branch

  1. 1. Check current kernel version using 'uname -r'
  2. 2. Identify which affected kernel branch your system is running (e.g., 6.12.x, 6.13-6.18.x, 6.19.x, or 7.0)
  3. 3. For systems running 6.12.x: upgrade to kernel version >= 6.12.75
  4. 4. For systems running 6.13-6.18.x: upgrade to kernel version >= 6.18.16
  5. 5. For systems running 6.19.x: upgrade to kernel version >= 6.19.6
  6. 6. For systems running 7.0: upgrade to a version > 7.0
  7. 7. Reboot the system to load the fixed kernel
  8. 8. Verify the fix is applied by checking the kernel version and confirming the commit 3307459eb3583115264421e859858d1f90f3694a is included
Caveat Kernel upgrades may require matching system utilities and drivers; ensure backup of system before upgrade

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-43318 in production — separate from our analysis above.

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  • Version or environment caveats, and links to real fixes
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