ghsa-87jq-rxj7-28vf
Vulnerability from github
Published
2025-02-27 21:32
Modified
2025-02-27 21:32
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

RDMA/hfi1: Fix use-after-free bug for mm struct

Under certain conditions, such as MPI_Abort, the hfi1 cleanup code may represent the last reference held on the task mm. hfi1_mmu_rb_unregister() then drops the last reference and the mm is freed before the final use in hfi1_release_user_pages(). A new task may allocate the mm structure while it is still being used, resulting in problems. One manifestation is corruption of the mmap_sem counter leading to a hang in down_write(). Another is corruption of an mm struct that is in use by another task.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49076"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:00:44Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/hfi1: Fix use-after-free bug for mm struct\n\nUnder certain conditions, such as MPI_Abort, the hfi1 cleanup code may\nrepresent the last reference held on the task mm.\nhfi1_mmu_rb_unregister() then drops the last reference and the mm is freed\nbefore the final use in hfi1_release_user_pages().  A new task may\nallocate the mm structure while it is still being used, resulting in\nproblems. One manifestation is corruption of the mmap_sem counter leading\nto a hang in down_write().  Another is corruption of an mm struct that is\nin use by another task.",
  "id": "GHSA-87jq-rxj7-28vf",
  "modified": "2025-02-27T21:32:10Z",
  "published": "2025-02-27T21:32:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49076"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b7186d657ee55e2cdefae498f07d5c1961e8023"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2bbac98d0930e8161b1957dc0ec99de39ade1b3c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a9a1b24ddb510715f8f621263938186579a965c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f54364ff6cfcd14cddf5441c4a490bb28dd69f7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ca11bd8222a612de0d2f54d050bfcf61ae2883f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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