ghsa-7m36-cvpv-mmfp
Vulnerability from github
Published
2025-05-02 18:31
Modified
2025-05-02 18:31
Details

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

ftrace: Fix invalid address access in lookup_rec() when index is 0

KASAN reported follow problem:

BUG: KASAN: use-after-free in lookup_rec Read of size 8 at addr ffff000199270ff0 by task modprobe CPU: 2 Comm: modprobe Call trace: kasan_report __asan_load8 lookup_rec ftrace_location arch_check_ftrace_location check_kprobe_address_safe register_kprobe

When checking pg->records[pg->index - 1].ip in lookup_rec(), it can get a pg which is newly added to ftrace_pages_start in ftrace_process_locs(). Before the first pg->index++, index is 0 and accessing pg->records[-1].ip will cause this problem.

Don't check the ip when pg->index is 0.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53075"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-02T16:15:26Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Fix invalid address access in lookup_rec() when index is 0\n\nKASAN reported follow problem:\n\n BUG: KASAN: use-after-free in lookup_rec\n Read of size 8 at addr ffff000199270ff0 by task modprobe\n CPU: 2 Comm: modprobe\n Call trace:\n  kasan_report\n  __asan_load8\n  lookup_rec\n  ftrace_location\n  arch_check_ftrace_location\n  check_kprobe_address_safe\n  register_kprobe\n\nWhen checking pg-\u003erecords[pg-\u003eindex - 1].ip in lookup_rec(), it can get a\npg which is newly added to ftrace_pages_start in ftrace_process_locs().\nBefore the first pg-\u003eindex++, index is 0 and accessing pg-\u003erecords[-1].ip\nwill cause this problem.\n\nDon\u0027t check the ip when pg-\u003eindex is 0.",
  "id": "GHSA-7m36-cvpv-mmfp",
  "modified": "2025-05-02T18:31:35Z",
  "published": "2025-05-02T18:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53075"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a0d71fabfeb349216d33f001a6421b1768bd3a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2de28e5ce34b22b73b833a21e2c45ae3aade3964"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f84f31f63416b0f02fc146ffdc4ab32723eb7e8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7569ee04b0e3b32df79f64db3a7138573edad9bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83c3b2f4e7c61367c7b24551f4c6eb94bbdda283"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac58b88ccbbb8e9fb83e137cee04a856b1ea6635"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee92fa443358f4fc0017c1d0d325c27b37802504"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1bd8b7fd890d87d0dc4dedc6287ea34dd07c0b4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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