drm/amdgpu: Fix fence put before wait in amdgpu_amdkfd_submit_ib_CVE-2026-31566

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Fix fence put before wait in amdgpu_amdkfd_submit_ib\n\namdgpu_amdkfd_submit_ib() submits a GPU job and gets a fence\nfrom amdgpu_ib_schedule(). This fence is used to wait for job\ncompletion.\n\nCurrently, the code drops the fence reference using dma_fence_put()\nbefore calling dma_fence_wait().\n\nIf dma_fence_put() releases the last reference, the fence may be\nfreed before dma_fence_wait() is called. This can lead to a\nuse-after-free.\n\nFix this by waiting on the fence first and releasing the reference\nonly after dma_fence_wait() completes.\n\nFixes the below:\ndrivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c:697 amdgpu_amdkfd_submit_ib() warn: passing freed memory 'f' (line 696)\n\n(cherry picked from commit 8b9e5259adc385b61a6590a13b82ae0ac2bd3482)",
    "published": "2026-04-24T14:35:46.740Z",
    "modified": "2026-04-27T14:04:06.894Z",
    "type": "cve",
    "title": "drm/amdgpu: Fix fence put before wait in amdgpu_amdkfd_submit_ib",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/bc7760c107dc08ef3e231d72c492e67b0a86848b\nhttps://git.kernel.org/stable/c/e23602eb0779760544314ed3905fa6a89a4e4070\nhttps://git.kernel.org/stable/c/138e42be35ff2ce6572ae744de851ea286cf3c69\nhttps://git.kernel.org/stable/c/39820864eacd886f1a6f817414fb8f9ea3e9a2b4\nhttps://git.kernel.org/stable/c/42d248726a0837640452b71c5a202ca3d35239ec\nhttps://git.kernel.org/stable/c/7150850146ebfa4ca998f653f264b8df6f7f85be",
    "id": "CVE-2026-31566",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 9ae55f030dc523fc4dc6069557e4a887ea815453\nLinux Linux 9ae55f030dc523fc4dc6069557e4a887ea815453\nLinux Linux 9ae55f030dc523fc4dc6069557e4a887ea815453\nLinux Linux 9ae55f030dc523fc4dc6069557e4a887ea815453\nLinux Linux 9ae55f030dc523fc4dc6069557e4a887ea815453\nLinux Linux 9ae55f030dc523fc4dc6069557e4a887ea815453\nLinux Linux 6.0",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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            "privilegesRequired": "",
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "9ae55f030dc523fc4dc6069557e4a887ea815453",
    "vendor": "Linux",
    "ai_description": "",
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    "ai_score": 0
}