drm/xe: Fix error cleanup in xe_exec_queue_create_ioctl()_CVE-2026-52976

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Fix error cleanup in xe_exec_queue_create_ioctl()\n\nTwo error handling issues exist in xe_exec_queue_create_ioctl():\n\n1. When xe_hw_engine_group_add_exec_queue() fails, the error path jumps\n   to put_exec_queue which skips xe_exec_queue_kill(). If the VM is in\n   preempt fence mode, xe_vm_add_compute_exec_queue() has already added\n   the queue to the VM's compute exec queue list. Skipping the kill\n   leaves the queue on that list, leading to a dangling pointer after\n   the queue is freed.\n\n2. When xa_alloc() fails after xe_hw_engine_group_add_exec_queue() has\n   succeeded, the error path does not call\n   xe_hw_engine_group_del_exec_queue() to remove the queue from the hw\n   engine group list. The queue is then freed while still linked into\n   the hw engine group, causing a use-after-free.\n\nFix both by:\n- Changing the xe_hw_engine_group_add_exec_queue() failure path to jump\n  to kill_exec_queue so that xe_exec_queue_kill() properly removes the\n  queue from the VM's compute list.\n- Adding a del_hw_engine_group label before kill_exec_queue for the\n  xa_alloc() failure path, which removes the queue from the hw engine\n  group before proceeding with the rest of the cleanup.\n\n(cherry picked from commit 37c831f401746a45d510b312b0ed7a77b1e06ec8)",
    "published": "2026-06-24T16:28:53.147Z",
    "modified": "2026-06-28T06:37:31.524Z",
    "type": "cve",
    "title": "drm/xe: Fix error cleanup in xe_exec_queue_create_ioctl()",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/f93b00161213a0fe9f7ff1d8498ee5ca9e0a5c43\nhttps://git.kernel.org/stable/c/753b149d5a433eb19e0c1b0eb4526a6e26120d1f\nhttps://git.kernel.org/stable/c/1be55646d8a2035343b012dcb12210db7bb8b056\nhttps://git.kernel.org/stable/c/f3cc22d4df3ed58439ea7e21daa54c3608e03b78",
    "id": "CVE-2026-52976",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 7970cb36966c9b9183255dc097ae0446300eebcf\nLinux Linux 7970cb36966c9b9183255dc097ae0446300eebcf\nLinux Linux 7970cb36966c9b9183255dc097ae0446300eebcf\nLinux Linux 7970cb36966c9b9183255dc097ae0446300eebcf\nLinux Linux 6.12",
    "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": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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            "baseScore": 0,
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "7970cb36966c9b9183255dc097ae0446300eebcf",
    "vendor": "Linux",
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    "ai_score": 0
}