{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53188",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.390Z",
        "datePublished": "2026-06-25T08:39:00.960Z",
        "dateUpdated": "2026-08-05T12:33:55.380Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:33:55.380Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Validate the passed in fops for ib_get_ucaps()\n\nSashiko pointed out it is not safe to rely only on the devt because\nchar/block alias so if the user finds a block device with the same dev_t\nit can masquerade as a ucap cdev fd.\n\nTest the f_ops to only accept authentic cdevs."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable path is reached locally through the RDMA uverbs character device by submitting GET_CONTEXT with a user-controlled fd array.\nAC:L - There is no race or fragile memory condition; on a system with a matching accessible block-device dev_t, exploitation is a straightforward fd substitution.\nPR:L - An unprivileged local user can open the world-accessible uverbs device, and the bypass avoids the intended root-only UCAP character device permission check.\nUI:N - No victim action is required once the attacker can run local code and open the relevant device files.\nS:C - The bypass can grant mlx5 RDMA control capabilities including other-VHCA control, plausibly affecting HCA/vport resources outside the attacker's normal RDMA security context.\nC:H - Unauthorized RDMA control and flow steering can expose or redirect RDMA traffic and resources that should require an explicitly granted UCAP.\nI:H - The attacker can obtain privileged RDMA/HCA control capabilities that may allow modification or redirection of RDMA flow state and other protected device behavior.\nA:H - The same unauthorized control can be used to drop, disrupt, or exhaust RDMA/HCA resources, causing loss of availability for affected RDMA workloads."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/infiniband/core/ucaps.c"
                    ],
                    "versions": [
                        {
                            "version": "61e51682816d395307f78ae06d640089054c28ab",
                            "lessThan": "96b6e98ff12d50ed5817230c6f1188e1150d225d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61e51682816d395307f78ae06d640089054c28ab",
                            "lessThan": "aa181287ebdcc53ee0ba5c2f8243e2d541ebc19b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61e51682816d395307f78ae06d640089054c28ab",
                            "lessThan": "4a1b1ac2744694a2ecd66a84bdb1445f4ef24bee",
                            "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/core/ucaps.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.36",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.13",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "6.15",
                                    "versionEndExcluding": "6.18.36"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "7.0.13"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "7.1"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/96b6e98ff12d50ed5817230c6f1188e1150d225d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/aa181287ebdcc53ee0ba5c2f8243e2d541ebc19b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4a1b1ac2744694a2ecd66a84bdb1445f4ef24bee"
                }
            ],
            "title": "RDMA/core: Validate the passed in fops for ib_get_ucaps()",
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}