drm/amdkfd: Fix the case that vm range is hole at svm_migrate_copy_to_vram
CVE-2026-89808 · published 16 Sept 2026
How serious is it
- Severity: high, CVSS score 7.8 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-2026-89808?
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Who is affected
- Linux Linux: 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11 to < 6e1a6f3ddb87d7f89a775c55fb399680c02bdcc2, 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11 to < bd1adb2e5101db649121b59e601c92773a302a70, 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11 to < ae806a95b28fcecb913430cfa45a252e91a945d6, 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11 to < 0a9a0e8a97da70a0336c9115178aaf1be29bcfb1
- Linux Linux: 5.14
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: Fix the case that vm range is hole at svm_migrate_copy_to_vram
When migration vm range is hole at cpu side(MIGRATE_PFN_MIGRATE set +
MIGRATE_PFN_VALID unset) driver still allocates device pages. There is no
dma map of src pages and migration. j is 0 and svm_migrate_copy_memory_gart()
will return an uninitialized r. That can trigger out_free_vram_pages to drop
all VRAM just set up.
Initialize r and only call the last svm_migrate_copy_memory_gart if j > 0.
Current code postponed the last page to the final copy. This patch flushes on
the last page when reach to the end of current drm_buddy_block; avoids another
svm_migrate_copy_memory_gart.
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/6e1a6f3ddb87d7f89a775c55fb399680c02bdcc2
- git.kernel.org/stable/c/bd1adb2e5101db649121b59e601c92773a302a70
- git.kernel.org/stable/c/ae806a95b28fcecb913430cfa45a252e91a945d6
- git.kernel.org/stable/c/0a9a0e8a97da70a0336c9115178aaf1be29bcfb1
- git.kernel.org/stable/c/520e345ffe05aabef1db82beda4288afb1757ff2
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON