FKIE_CVE-2026-45852

Vulnerability from fkie_nvd - Published: 2026-05-27 14:16 - Updated: 2026-07-07 12:16
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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/0beefd0e15d962f497aad750b2d5e9c3570b66d1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9abff51163aa1bc275ec356f74fe976291860a7fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b98ab5494dbd48652561aa0b9c32f10500220745Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d493e0bfc748a520c349d6c8791b262aa5ad2e4ePatch
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:25120
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:25121
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:25217
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:27713
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:33899
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:34094
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:35844
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:35863
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:35896
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-45852
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2482166
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45852.json
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
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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": "2026-07-07T12:16:51.740",
  "metrics": {
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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  "published": "2026-05-27T14:16:57.193",
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      "tags": [
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      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
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      "url": "https://access.redhat.com/errata/RHSA-2026:34094"
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      "url": "https://access.redhat.com/errata/RHSA-2026:35844"
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      "url": "https://access.redhat.com/security/cve/CVE-2026-45852"
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      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45852.json"
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.