ghsa-fwfj-54vh-4r92
Vulnerability from github
Published
2024-11-07 12:30
Modified
2024-11-13 15:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

scsi: target: core: Fix null-ptr-deref in target_alloc_device()

There is a null-ptr-deref issue reported by KASAN:

BUG: KASAN: null-ptr-deref in target_alloc_device+0xbc4/0xbe0 [target_core_mod] ... kasan_report+0xb9/0xf0 target_alloc_device+0xbc4/0xbe0 [target_core_mod] core_dev_setup_virtual_lun0+0xef/0x1f0 [target_core_mod] target_core_init_configfs+0x205/0x420 [target_core_mod] do_one_initcall+0xdd/0x4e0 ... entry_SYSCALL_64_after_hwframe+0x76/0x7e

In target_alloc_device(), if allocing memory for dev queues fails, then dev will be freed by dev->transport->free_device(), but dev->transport is not initialized at that time, which will lead to a null pointer reference problem.

Fixing this bug by freeing dev with hba->backend->ops->free_device().

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{
  "affected": [],
  "aliases": [
    "CVE-2024-50153"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-07T10:15:06Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: core: Fix null-ptr-deref in target_alloc_device()\n\nThere is a null-ptr-deref issue reported by KASAN:\n\nBUG: KASAN: null-ptr-deref in target_alloc_device+0xbc4/0xbe0 [target_core_mod]\n...\n kasan_report+0xb9/0xf0\n target_alloc_device+0xbc4/0xbe0 [target_core_mod]\n core_dev_setup_virtual_lun0+0xef/0x1f0 [target_core_mod]\n target_core_init_configfs+0x205/0x420 [target_core_mod]\n do_one_initcall+0xdd/0x4e0\n...\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nIn target_alloc_device(), if allocing memory for dev queues fails, then\ndev will be freed by dev-\u003etransport-\u003efree_device(), but dev-\u003etransport\nis not initialized at that time, which will lead to a null pointer\nreference problem.\n\nFixing this bug by freeing dev with hba-\u003ebackend-\u003eops-\u003efree_device().",
  "id": "GHSA-fwfj-54vh-4r92",
  "modified": "2024-11-13T15:31:37Z",
  "published": "2024-11-07T12:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50153"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14a6a2adb440e4ae97bee73b2360946bd033dadd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/39e02fa90323243187c91bb3e8f2f5f6a9aacfc7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/895ab729425ef9bf3b6d2f8d0853abe64896f314"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c1e6717f60d31f8af3937c23c4f1498529584e1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b80e9bc85bd9af378e7eac83e15dd129557bbdb6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fca6caeb4a61d240f031914413fcc69534f6dc03"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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