{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53504",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-10-01T11:39:39.404Z",
        "datePublished": "2025-10-01T11:45:54.977Z",
        "dateUpdated": "2026-08-05T09:14:30.751Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T09:14:30.751Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: Properly order ib_device_unalloc() to avoid UAF\n\nib_dealloc_device() should be called only after device cleanup.  Fix the\ndealloc sequence."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The UAF occurs in the bnxt_re auxiliary-device removal path, reachable only from local operations on the host (PCI device unbind/removal, module unload, SR-IOV teardown) and exploited by a local heap-spray to reclaim the freed rdev; there is no remote or adjacent-network trigger.\nAC:L - The use-after-free is unconditional — every removal frees rdev and then runs the entire bnxt_re_dev_uninit() on it, with no race to win — and the RCU-deferred free plus multi-second firmware-command waits inside the function give a wide, attacker-influenceable window for reclaiming the allocation.\nPR:L - An unprivileged local user supplies the exploitation half by spraying to reclaim the freed multi-KB rdev allocation, after which the freed-memory writes and pointer dereferences act on attacker-controlled data; NIC teardown (hot-plug, SR-IOV reconfiguration, driver reload) is routine in cloud and container hosts, so no elevated privilege is assumed for the attacker.\nUI:N - No victim interaction is needed — the teardown occurs automatically via PCI hot-unplug, error-recovery re-probe, SR-IOV changes, or driver reload during upgrades, and the UAF fires unconditionally once it starts.\nS:U - Both the freed object and all corrupted state live in kernel memory under the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed rdev is read extensively after release (rdev->en_dev, rdev->chip_ctx, rdev->rcfw, rdev->qplib_res/qplib_ctx), so reclaiming the slab lets an attacker leak adjacent kernel data and pointers, and mis-freed DMA/kernel buffers can be re-read.\nI:H - The path performs writes into freed memory (test_and_clear_bit on rdev->flags, rdev->num_msix = 0) and kfree/dma_free_coherent on pointers read from the freed struct, yielding a controlled-free and heap-corruption primitive that is leverageable for control-flow hijack.\nA:H - Even unexploited, the UAF corrupts the slab and dereferences stale pointers (bnxt_unregister_dev(rdev->en_dev), chip_ctx teardown), producing KASAN splats, oopses, and kernel panics on every affected device removal."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/infiniband/hw/bnxt_re/main.c"
                    ],
                    "versions": [
                        {
                            "version": "6d758147c7b80a46465f72e9e6294d244ee98a21",
                            "lessThan": "c95863f6d970ef968e7c1f3c481f72a4b0734654",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6d758147c7b80a46465f72e9e6294d244ee98a21",
                            "lessThan": "5363fc488da579923edf6a2fdca3d3b651dd800b",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/infiniband/hw/bnxt_re/main.c"
                    ],
                    "versions": [
                        {
                            "version": "6.3",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.3",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4.11",
                            "lessThanOrEqual": "6.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.5",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.3",
                                    "versionEndExcluding": "6.4.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.3",
                                    "versionEndExcluding": "6.5"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/c95863f6d970ef968e7c1f3c481f72a4b0734654"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5363fc488da579923edf6a2fdca3d3b651dd800b"
                }
            ],
            "title": "RDMA/bnxt_re: Properly order ib_device_unalloc() to avoid UAF",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}