drm/amdkfd: clamp v9 CRIU control stack checkpoint copy to BO size
CVE-2026-68447 · published 12 Aug 2026
How serious is it
- Severity: high, CVSS score 7.1 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-68447?
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Who is affected
- Linux Linux: 3a9822d7bd623be9000cef8101ecf8479fa53f2c to < 1218c6dcec80f886372635e82f3229d5babc37d3, 3a9822d7bd623be9000cef8101ecf8479fa53f2c to < a0d87beb2660a5098b2b0ecdc1e96810a9074ea9, 3a9822d7bd623be9000cef8101ecf8479fa53f2c to < 426ffae6ecc7ec77d32bf8be065c21a1b881b084
- Linux Linux: 5.18
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
In the Linux kernel, the following vulnerability has been resolved:
drm/amdkfd: clamp v9 CRIU control stack checkpoint copy to BO size
CRIU checkpoint copies the MQD control stack using cp_hqd_cntl_stack_size
from hardware without bounding it to the allocated BO region. If the HW
field is larger than the queue's control stack allocation, memcpy reads
past the BO into adjacent GTT memory and can leak kernel data to userspace.
Store the page-aligned control stack BO size in mqd_manager and clamp
checkpoint copies and reported checkpoint sizes to
min(cp_hqd_cntl_stack_size, mm->ctl_stack_size). Apply the same bound
for multi-XCC v9.4.3 checkpoint layout.
(cherry picked from commit 6c2abd0ec09e86c6323010673766f76050e28aa3)
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/1218c6dcec80f886372635e82f3229d5babc37d3
- git.kernel.org/stable/c/a0d87beb2660a5098b2b0ecdc1e96810a9074ea9
- git.kernel.org/stable/c/426ffae6ecc7ec77d32bf8be065c21a1b881b084
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON