GHSA-JP9Q-C7F4-2FXF

Vulnerability from github – Published: 2024-05-21 18:31 – Updated: 2025-11-03 21:31
VLAI?
Details

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

smb: client: fix potential deadlock when releasing mids

All release_mid() callers seem to hold a reference of @mid so there is no need to call kref_put(&mid->refcount, __release_mid) under @server->mid_lock spinlock. If they don't, then an use-after-free bug would have occurred anyways.

By getting rid of such spinlock also fixes a potential deadlock as shown below

CPU 0 CPU 1

cifs_demultiplex_thread() cifs_debug_data_proc_show() release_mid() spin_lock(&server->mid_lock); spin_lock(&cifs_tcp_ses_lock) spin_lock(&server->mid_lock) __release_mid() smb2_find_smb_tcon() spin_lock(&cifs_tcp_ses_lock) deadlock

Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2023-52757"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T16:15:15Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential deadlock when releasing mids\n\nAll release_mid() callers seem to hold a reference of @mid so there is\nno need to call kref_put(\u0026mid-\u003erefcount, __release_mid) under\n@server-\u003emid_lock spinlock.  If they don\u0027t, then an use-after-free bug\nwould have occurred anyways.\n\nBy getting rid of such spinlock also fixes a potential deadlock as\nshown below\n\nCPU 0                                CPU 1\n------------------------------------------------------------------\ncifs_demultiplex_thread()            cifs_debug_data_proc_show()\n release_mid()\n  spin_lock(\u0026server-\u003emid_lock);\n                                     spin_lock(\u0026cifs_tcp_ses_lock)\n\t\t\t\t      spin_lock(\u0026server-\u003emid_lock)\n  __release_mid()\n   smb2_find_smb_tcon()\n    spin_lock(\u0026cifs_tcp_ses_lock) *deadlock*",
  "id": "GHSA-jp9q-c7f4-2fxf",
  "modified": "2025-11-03T21:31:05Z",
  "published": "2024-05-21T18:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52757"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99f476e27aad5964ab13777d84fda67d1356dec1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9eb44db68c5b7f5aa22b8fc7de74a3e2e08d1f29"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b9bb9607b1fc12fca51f5632da25b36975f599bf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c1a5962f1462b64fe7b69f20a4b6af8067bc2d26"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce49569079a9d4cad26c0f1d4653382fd9a5ca7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6322fd177c6885a21dd4609dc5e5c973d1a2eb7"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    }
  ],
  "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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