ghsa-xgf9-7jgm-fgxp
Vulnerability from github
Published
2025-12-30 15:30
Modified
2025-12-30 15:30
Details

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

usb: typec: altmodes/displayport: fix pin_assignment_show

This patch fixes negative indexing of buf array in pin_assignment_show when get_current_pin_assignments returns 0 i.e. no compatible pin assignments are found.

BUG: KASAN: use-after-free in pin_assignment_show+0x26c/0x33c ... Call trace: dump_backtrace+0x110/0x204 dump_stack_lvl+0x84/0xbc print_report+0x358/0x974 kasan_report+0x9c/0xfc __do_kernel_fault+0xd4/0x2d4 do_bad_area+0x48/0x168 do_tag_check_fault+0x24/0x38 do_mem_abort+0x6c/0x14c el1_abort+0x44/0x68 el1h_64_sync_handler+0x64/0xa4 el1h_64_sync+0x78/0x7c pin_assignment_show+0x26c/0x33c dev_attr_show+0x50/0xc0

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{
  "affected": [],
  "aliases": [
    "CVE-2023-54186"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-30T13:16:06Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: altmodes/displayport: fix pin_assignment_show\n\nThis patch fixes negative indexing of buf array in pin_assignment_show\nwhen get_current_pin_assignments returns 0 i.e. no compatible pin\nassignments are found.\n\nBUG: KASAN: use-after-free in pin_assignment_show+0x26c/0x33c\n...\nCall trace:\ndump_backtrace+0x110/0x204\ndump_stack_lvl+0x84/0xbc\nprint_report+0x358/0x974\nkasan_report+0x9c/0xfc\n__do_kernel_fault+0xd4/0x2d4\ndo_bad_area+0x48/0x168\ndo_tag_check_fault+0x24/0x38\ndo_mem_abort+0x6c/0x14c\nel1_abort+0x44/0x68\nel1h_64_sync_handler+0x64/0xa4\nel1h_64_sync+0x78/0x7c\npin_assignment_show+0x26c/0x33c\ndev_attr_show+0x50/0xc0",
  "id": "GHSA-xgf9-7jgm-fgxp",
  "modified": "2025-12-30T15:30:30Z",
  "published": "2025-12-30T15:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54186"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08bd1be1c716fd50a7df48f82dcbc59a103082b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e61a7432fcd4bca06f05b7f1c7d7cb461880fe2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f9c0a7c272626cb6716ffc7800e8c73260cdce6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54ee23e4ab263a495ace1eed43d3883212ece17f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d8f28269dd4bf9b55c3fb376ae31512730a96fce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc0e18f95c88435bd8a1ceb540243cd7fbcd9781"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff466f77d0a56719979c4234abd412abd98eae8f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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