FKIE_CVE-2026-45852

Vulnerability from fkie_nvd - Published: 2026-05-27 14:16 - Updated: 2026-05-27 14:48
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix double free in rxe_srq_from_init In rxe_srq_from_init(), the queue pointer 'q' is assigned to 'srq->rq.queue' before copying the SRQ number to user space. If copy_to_user() fails, the function calls rxe_queue_cleanup() to free the queue, but leaves the now-invalid pointer in 'srq->rq.queue'. The caller of rxe_srq_from_init() (rxe_create_srq) eventually calls rxe_srq_cleanup() upon receiving the error, which triggers a second rxe_queue_cleanup() on the same memory, leading to a double free. The call trace looks like this: kmem_cache_free+0x.../0x... rxe_queue_cleanup+0x1a/0x30 [rdma_rxe] rxe_srq_cleanup+0x42/0x60 [rdma_rxe] rxe_elem_release+0x31/0x70 [rdma_rxe] rxe_create_srq+0x12b/0x1a0 [rdma_rxe] ib_create_srq_user+0x9a/0x150 [ib_core] Fix this by moving 'srq->rq.queue = q' after copy_to_user.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0beefd0e15d962f497aad750b2d5e9c3570b66d1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/22b8c23a3b92d023614bb00896fe364b2c1a31d3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/af5956243018918130d52c9f671efdb40bab3366
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d286f0d4e3ad3caf5f0e673cdad7bf89bf37d947
Impacted products
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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 \u0027q\u0027 is assigned to\n\u0027srq-\u003erq.queue\u0027 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\u0027srq-\u003erq.queue\u0027.\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 \u0027srq-\u003erq.queue = q\u0027 after copy_to_user."
    }
  ],
  "id": "CVE-2026-45852",
  "lastModified": "2026-05-27T14:48:31.480",
  "metrics": {},
  "published": "2026-05-27T14:16:57.193",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0beefd0e15d962f497aad750b2d5e9c3570b66d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/22b8c23a3b92d023614bb00896fe364b2c1a31d3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/af5956243018918130d52c9f671efdb40bab3366"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d286f0d4e3ad3caf5f0e673cdad7bf89bf37d947"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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