GHSA-R66W-V4MR-3PXG
Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-10-30 15:33In 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.
{
"affected": [],
"aliases": [
"CVE-2026-89808"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T11:16:45Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Fix the case that vm range is hole at svm_migrate_copy_to_vram\n\nWhen migration vm range is hole at cpu side(MIGRATE_PFN_MIGRATE set +\nMIGRATE_PFN_VALID unset) driver still allocates device pages. There is no\ndma map of src pages and migration. j is 0 and svm_migrate_copy_memory_gart()\nwill return an uninitialized r. That can trigger out_free_vram_pages to drop\nall VRAM just set up.\n\nInitialize r and only call the last svm_migrate_copy_memory_gart if j \u003e 0.\n\nCurrent code postponed the last page to the final copy. This patch flushes on\nthe last page when reach to the end of current drm_buddy_block; avoids another\nsvm_migrate_copy_memory_gart.",
"id": "GHSA-r66w-v4mr-3pxg",
"modified": "2026-10-30T15:33:27Z",
"published": "2026-09-16T12:30:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89808"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0a9a0e8a97da70a0336c9115178aaf1be29bcfb1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/520e345ffe05aabef1db82beda4288afb1757ff2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6e1a6f3ddb87d7f89a775c55fb399680c02bdcc2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ae806a95b28fcecb913430cfa45a252e91a945d6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bd1adb2e5101db649121b59e601c92773a302a70"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d5872c81c70163a3ba9eb4da9a94c92b03067576"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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