CVE-2022-49492 (GCVE-0-2022-49492)
Vulnerability from cvelistv5
Published
2025-02-26 02:13
Modified
2026-05-11 19:00
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fix a NULL pointer dereference in nvme_alloc_admin_tags In nvme_alloc_admin_tags, the admin_q can be set to an error (typically -ENOMEM) if the blk_mq_init_queue call fails to set up the queue, which is checked immediately after the call. However, when we return the error message up the stack, to nvme_reset_work the error takes us to nvme_remove_dead_ctrl() nvme_dev_disable() nvme_suspend_queue(&dev->queues[0]). Here, we only check that the admin_q is non-NULL, rather than not an error or NULL, and begin quiescing a queue that never existed, leading to bad / NULL pointer dereference.
References
Impacted products
Vendor Product Version
Linux Linux Version: 35b489d32fcc37e8735f41aa794b24cf9d1e74f5
Version: 35b489d32fcc37e8735f41aa794b24cf9d1e74f5
Version: 35b489d32fcc37e8735f41aa794b24cf9d1e74f5
Version: 35b489d32fcc37e8735f41aa794b24cf9d1e74f5
Version: 35b489d32fcc37e8735f41aa794b24cf9d1e74f5
Version: 35b489d32fcc37e8735f41aa794b24cf9d1e74f5
Version: 35b489d32fcc37e8735f41aa794b24cf9d1e74f5
Version: 35b489d32fcc37e8735f41aa794b24cf9d1e74f5
Version: 35b489d32fcc37e8735f41aa794b24cf9d1e74f5
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-pci: fix a NULL pointer dereference in nvme_alloc_admin_tags\n\nIn nvme_alloc_admin_tags, the admin_q can be set to an error (typically\n-ENOMEM) if the blk_mq_init_queue call fails to set up the queue, which\nis checked immediately after the call. However, when we return the error\nmessage up the stack, to nvme_reset_work the error takes us to\nnvme_remove_dead_ctrl()\n  nvme_dev_disable()\n   nvme_suspend_queue(\u0026dev-\u003equeues[0]).\n\nHere, we only check that the admin_q is non-NULL, rather than not\nan error or NULL, and begin quiescing a queue that never existed, leading\nto bad / NULL pointer dereference."
        }
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    "state": "PUBLISHED"
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