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GHSA-QHG6-V8XH-PWH7

Vulnerability from github – Published: 2025-03-27 18:31 – Updated: 2025-10-30 18:31
VLAI
Details

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

tracing: Make sure trace_printk() can output as soon as it can be used

Currently trace_printk() can be used as soon as early_trace_init() is called from start_kernel(). But if a crash happens, and "ftrace_dump_on_oops" is set on the kernel command line, all you get will be:

[ 0.456075] -0 0dN.2. 347519us : Unknown type 6 [ 0.456075] -0 0dN.2. 353141us : Unknown type 6 [ 0.456075] -0 0dN.2. 358684us : Unknown type 6

This is because the trace_printk() event (type 6) hasn't been registered yet. That gets done via an early_initcall(), which may be early, but not early enough.

Instead of registering the trace_printk() event (and other ftrace events, which are not trace events) via an early_initcall(), have them registered at the same time that trace_printk() can be used. This way, if there is a crash before early_initcall(), then the trace_printk()s will actually be useful.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2023-53007"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-03-27T17:15:49Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Make sure trace_printk() can output as soon as it can be used\n\nCurrently trace_printk() can be used as soon as early_trace_init() is\ncalled from start_kernel(). But if a crash happens, and\n\"ftrace_dump_on_oops\" is set on the kernel command line, all you get will\nbe:\n\n  [    0.456075]   \u003cidle\u003e-0         0dN.2. 347519us : Unknown type 6\n  [    0.456075]   \u003cidle\u003e-0         0dN.2. 353141us : Unknown type 6\n  [    0.456075]   \u003cidle\u003e-0         0dN.2. 358684us : Unknown type 6\n\nThis is because the trace_printk() event (type 6) hasn\u0027t been registered\nyet. That gets done via an early_initcall(), which may be early, but not\nearly enough.\n\nInstead of registering the trace_printk() event (and other ftrace events,\nwhich are not trace events) via an early_initcall(), have them registered at\nthe same time that trace_printk() can be used. This way, if there is a\ncrash before early_initcall(), then the trace_printk()s will actually be\nuseful.",
  "id": "GHSA-qhg6-v8xh-pwh7",
  "modified": "2025-10-30T18:31:04Z",
  "published": "2025-03-27T18:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53007"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/198c83963f6335ca6d690cff067679560f2a3a22"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3bb06eb6e9acf7c4a3e1b5bc87aed398ff8e2253"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76b2390fdc80c0a8300e5da5b6b62d201b6fe9ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0af180514edea6c83dc9a299d9f383009c99f25"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b94d7c7654356860dd7719120c7d15ba38b6162a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de3930a4883ddad2244efd6d349013294c62c75c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f97eb0ab066133483a65c93eb894748de2f6b598"
    }
  ],
  "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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