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    "cveMetadata": {
        "cveId": "CVE-2021-47554",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-05-24T15:02:54.833Z",
        "datePublished": "2024-05-24T15:09:56.614Z",
        "dateUpdated": "2026-05-11T13:56:52.458Z"
    },
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                "dateUpdated": "2026-05-11T13:56:52.458Z"
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            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa_sim: avoid putting an uninitialized iova_domain\n\nThe system will crash if we put an uninitialized iova_domain, this\ncould happen when an error occurs before initializing the iova_domain\nin vdpasim_create().\n\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n...\nRIP: 0010:__cpuhp_state_remove_instance+0x96/0x1c0\n...\nCall Trace:\n <TASK>\n put_iova_domain+0x29/0x220\n vdpasim_free+0xd1/0x120 [vdpa_sim]\n vdpa_release_dev+0x21/0x40 [vdpa]\n device_release+0x33/0x90\n kobject_release+0x63/0x160\n vdpasim_create+0x127/0x2a0 [vdpa_sim]\n vdpasim_net_dev_add+0x7d/0xfe [vdpa_sim_net]\n vdpa_nl_cmd_dev_add_set_doit+0xe1/0x1a0 [vdpa]\n genl_family_rcv_msg_doit+0x112/0x140\n genl_rcv_msg+0xdf/0x1d0\n ...\n\nSo we must make sure the iova_domain is already initialized before\nput it.\n\nIn addition, we may get the following warning in this case:\nWARNING: ... drivers/iommu/iova.c:344 iova_cache_put+0x58/0x70\n\nSo we must make sure the iova_cache_put() is invoked only if the\niova_cache_get() is already invoked. Let's fix it together."
                }
            ],
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                    "vendor": "Linux",
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                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                    "url": "https://git.kernel.org/stable/c/e4d58ac67e63727aa45a4a26185876f598e8b3dd"
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                    "url": "https://git.kernel.org/stable/c/bb93ce4b150dde79f58e34103cbd1fe829796649"
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            "title": "vdpa_sim: avoid putting an uninitialized iova_domain",
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