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CVE-2026-89509 (GCVE-0-2026-89509)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-11 19:43
VLAI
Title
RDMA/ionic: Embed counter driver data in rdma_counter allocation
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/ionic: Embed counter driver data in rdma_counter allocation Commit 7e53b31acc7f ("RDMA/core: Create and destroy rdma_counter using rdma_zalloc_drv_obj()") requires drivers implementing counter ops to embed struct rdma_counter in a driver-specific struct, register its size via INIT_RDMA_OBJ_SIZE, and provide a counter_init callback. The ionic driver was merged without this adaptation, causing a NULL pointer dereference in alloc_and_bind() since rdma_zalloc_drv_obj() allocates zero bytes when size_rdma_counter is unset. Consolidate struct ionic_counter into a new struct ionic_rdma_counter that embeds struct rdma_counter, replace the xarray with a lightweight ida for ID allocation, and add the required counter_init and INIT_RDMA_OBJ_SIZE declarations.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ea4c399642b85dc30f44d90ee805c6a18fa03062 , < c98197ee3cd28288da13dc9881bb9e74daa7cbbc (git)
Affected: ea4c399642b85dc30f44d90ee805c6a18fa03062 , < 08b8630b557828aedb1d9ef0a6e2ec421f334ee2 (git)
Affected: ea4c399642b85dc30f44d90ee805c6a18fa03062 , < cf3ebd89e754015625fee90aa938f6bc79a2c974 (git)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/infiniband/hw/ionic/ionic_hw_stats.c",
            "drivers/infiniband/hw/ionic/ionic_ibdev.h"
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/ionic: Embed counter driver data in rdma_counter allocation\n\nCommit 7e53b31acc7f (\"RDMA/core: Create and destroy rdma_counter using\nrdma_zalloc_drv_obj()\") requires drivers implementing counter ops to\nembed struct rdma_counter in a driver-specific struct, register its size\nvia INIT_RDMA_OBJ_SIZE, and provide a counter_init callback.\n\nThe ionic driver was merged without this adaptation, causing a NULL\npointer dereference in alloc_and_bind() since rdma_zalloc_drv_obj()\nallocates zero bytes when size_rdma_counter is unset.\n\nConsolidate struct ionic_counter into a new struct ionic_rdma_counter\nthat embeds struct rdma_counter, replace the xarray with a lightweight\nida for ID allocation, and add the required counter_init and\nINIT_RDMA_OBJ_SIZE declarations."
        }
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        "dateUpdated": "2026-09-11T19:43:55.336Z",
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        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/c98197ee3cd28288da13dc9881bb9e74daa7cbbc"
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    "datePublished": "2026-09-11T19:43:55.336Z",
    "dateReserved": "2026-09-11T19:38:34.716Z",
    "dateUpdated": "2026-09-11T19:43:55.336Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
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      "cve": "CVE-2026-89509",
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      "cve": "CVE-2026-89509",
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      "source": "SUSE CSAF VEX",
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      "title": "SUSE CVE CVE-2026-89509",
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    }
  }
}



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