RDMA/rxe: Fix double free in rxe_srq_from_init_CVE-2026-45852

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix double free in rxe_srq_from_init\n\nIn rxe_srq_from_init(), the queue pointer 'q' is assigned to\n'srq->rq.queue' before copying the SRQ number to user space.\nIf copy_to_user() fails, the function calls rxe_queue_cleanup()\nto free the queue, but leaves the now-invalid pointer in\n'srq->rq.queue'.\n\nThe caller of rxe_srq_from_init() (rxe_create_srq) eventually\ncalls rxe_srq_cleanup() upon receiving the error, which triggers\na second rxe_queue_cleanup() on the same memory, leading to a\ndouble free.\n\nThe call trace looks like this:\n   kmem_cache_free+0x.../0x...\n   rxe_queue_cleanup+0x1a/0x30 [rdma_rxe]\n   rxe_srq_cleanup+0x42/0x60 [rdma_rxe]\n   rxe_elem_release+0x31/0x70 [rdma_rxe]\n   rxe_create_srq+0x12b/0x1a0 [rdma_rxe]\n   ib_create_srq_user+0x9a/0x150 [ib_core]\n\nFix this by moving 'srq->rq.queue = q' after copy_to_user.",
    "published": "2026-05-27T12:15:26.084Z",
    "modified": "2026-05-30T10:45:31.506Z",
    "type": "cve",
    "title": "RDMA/rxe: Fix double free in rxe_srq_from_init",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/22b8c23a3b92d023614bb00896fe364b2c1a31d3\nhttps://git.kernel.org/stable/c/af5956243018918130d52c9f671efdb40bab3366\nhttps://git.kernel.org/stable/c/d286f0d4e3ad3caf5f0e673cdad7bf89bf37d947\nhttps://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8c\nhttps://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723b\nhttps://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8\nhttps://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddc\nhttps://git.kernel.org/stable/c/0beefd0e15d962f497aad750b2d5e9c3570b66d1",
    "id": "CVE-2026-45852",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux aae0484e15f062ad2c2502e68e15dfb8b8f84608\nLinux Linux aae0484e15f062ad2c2502e68e15dfb8b8f84608\nLinux Linux aae0484e15f062ad2c2502e68e15dfb8b8f84608\nLinux Linux aae0484e15f062ad2c2502e68e15dfb8b8f84608\nLinux Linux aae0484e15f062ad2c2502e68e15dfb8b8f84608\nLinux Linux aae0484e15f062ad2c2502e68e15dfb8b8f84608\nLinux Linux aae0484e15f062ad2c2502e68e15dfb8b8f84608\nLinux Linux aae0484e15f062ad2c2502e68e15dfb8b8f84608\nLinux Linux 350703fae672d4d649c3562c199eab5ec9dc7c79\nLinux Linux 4.19.86\nLinux Linux 4.20",
    "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": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "aae0484e15f062ad2c2502e68e15dfb8b8f84608",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}