ghsa-xcgf-679w-pgvp
Vulnerability from github
Published
2025-09-15 15:31
Modified
2025-09-15 15:31
Details

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

tracing: Fix null pointer dereference in tracing_err_log_open()

Fix an issue in function 'tracing_err_log_open'. The function doesn't call 'seq_open' if the file is opened only with write permissions, which results in 'file->private_data' being left as null. If we then use 'lseek' on that opened file, 'seq_lseek' dereferences 'file->private_data' in 'mutex_lock(&m->lock)', resulting in a kernel panic. Writing to this node requires root privileges, therefore this bug has very little security impact.

Tracefs node: /sys/kernel/tracing/error_log

Example Kernel panic:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000038 Call trace: mutex_lock+0x30/0x110 seq_lseek+0x34/0xb8 __arm64_sys_lseek+0x6c/0xb8 invoke_syscall+0x58/0x13c el0_svc_common+0xc4/0x10c do_el0_svc+0x24/0x98 el0_svc+0x24/0x88 el0t_64_sync_handler+0x84/0xe4 el0t_64_sync+0x1b4/0x1b8 Code: d503201f aa0803e0 aa1f03e1 aa0103e9 (c8e97d02) ---[ end trace 561d1b49c12cf8a5 ]--- Kernel panic - not syncing: Oops: Fatal exception

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53167"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-15T14:15:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix null pointer dereference in tracing_err_log_open()\n\nFix an issue in function \u0027tracing_err_log_open\u0027.\nThe function doesn\u0027t call \u0027seq_open\u0027 if the file is opened only with\nwrite permissions, which results in \u0027file-\u003eprivate_data\u0027 being left as null.\nIf we then use \u0027lseek\u0027 on that opened file, \u0027seq_lseek\u0027 dereferences\n\u0027file-\u003eprivate_data\u0027 in \u0027mutex_lock(\u0026m-\u003elock)\u0027, resulting in a kernel panic.\nWriting to this node requires root privileges, therefore this bug\nhas very little security impact.\n\nTracefs node: /sys/kernel/tracing/error_log\n\nExample Kernel panic:\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000038\nCall trace:\n mutex_lock+0x30/0x110\n seq_lseek+0x34/0xb8\n __arm64_sys_lseek+0x6c/0xb8\n invoke_syscall+0x58/0x13c\n el0_svc_common+0xc4/0x10c\n do_el0_svc+0x24/0x98\n el0_svc+0x24/0x88\n el0t_64_sync_handler+0x84/0xe4\n el0t_64_sync+0x1b4/0x1b8\nCode: d503201f aa0803e0 aa1f03e1 aa0103e9 (c8e97d02)\n---[ end trace 561d1b49c12cf8a5 ]---\nKernel panic - not syncing: Oops: Fatal exception",
  "id": "GHSA-xcgf-679w-pgvp",
  "modified": "2025-09-15T15:31:23Z",
  "published": "2025-09-15T15:31:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53167"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02b0095e2fbbc060560c1065f86a211d91e27b26"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e1c9aa9288a46c342f0f2c5c0b1c0876b9b0276"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b5d9b7b875968a8a8c99dac45cb85b705c44802"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7060e5aac6dc195124c106f49106d653a416323a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/93114cbc7cb169f6f26eeaed5286b91bb86b463b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/938d5b7a75e18264887387ddf9169db6d8aeef98"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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