GHSA-6F84-P6H5-X3QM

Vulnerability from github – Published: 2025-05-01 15:31 – Updated: 2025-11-05 18:14
VLAI
Details

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

i3c: Add NULL pointer check in i3c_master_queue_ibi()

The I3C master driver may receive an IBI from a target device that has not been probed yet. In such cases, the master calls i3c_master_queue_ibi() to queue an IBI work task, leading to "Unable to handle kernel read from unreadable memory" and resulting in a kernel panic.

Typical IBI handling flow: 1. The I3C master scans target devices and probes their respective drivers. 2. The target device driver calls i3c_device_request_ibi() to enable IBI and assigns dev->ibi = ibi. 3. The I3C master receives an IBI from the target device and calls i3c_master_queue_ibi() to queue the target device driver’s IBI handler task.

However, since target device events are asynchronous to the I3C probe sequence, step 3 may occur before step 2, causing dev->ibi to be NULL, leading to a kernel panic.

Add a NULL pointer check in i3c_master_queue_ibi() to prevent accessing an uninitialized dev->ibi, ensuring stability.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2025-23147"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-01T13:15:50Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: Add NULL pointer check in i3c_master_queue_ibi()\n\nThe I3C master driver may receive an IBI from a target device that has not\nbeen probed yet. In such cases, the master calls `i3c_master_queue_ibi()`\nto queue an IBI work task, leading to \"Unable to handle kernel read from\nunreadable memory\" and resulting in a kernel panic.\n\nTypical IBI handling flow:\n1. The I3C master scans target devices and probes their respective drivers.\n2. The target device driver calls `i3c_device_request_ibi()` to enable IBI\n   and assigns `dev-\u003eibi = ibi`.\n3. The I3C master receives an IBI from the target device and calls\n   `i3c_master_queue_ibi()` to queue the target device driver\u2019s IBI\n   handler task.\n\nHowever, since target device events are asynchronous to the I3C probe\nsequence, step 3 may occur before step 2, causing `dev-\u003eibi` to be `NULL`,\nleading to a kernel panic.\n\nAdd a NULL pointer check in `i3c_master_queue_ibi()` to prevent accessing\nan uninitialized `dev-\u003eibi`, ensuring stability.",
  "id": "GHSA-6f84-p6h5-x3qm",
  "modified": "2025-11-05T18:14:24Z",
  "published": "2025-05-01T15:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-23147"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09359e7c8751961937cb5fc50220969b0a4e1058"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b54faa5f47fa7c642179744aeff03f0810dc62e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ba402610843d7d15c7f3966a461deeeaff7fba4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6871a676aa534e8f218279672e0445c725f81026"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd496a44f041da9ef3afe14d1d6193d460424e91"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d83b0c03ef8fbea2f03029a1cc1f5041f0e1d47f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6bba328578feb58c614c11868c259b40484c5fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe4a4fc179b7898055555a11685915473588392e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff9d61db59bb27d16d3f872bff2620d50856b80c"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
    }
  ],
  "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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