GHSA-CP7G-R78M-CC2G

Vulnerability from github – Published: 2026-07-17 21:31 – Updated: 2026-09-21 12:32
VLAI
Details

A flaw was found in xdgmime. A heap-based buffer overflow can be triggered in _xdg_mime_magic_parse_magic_line() in the xdgmimemagic.c file on little-endian systems when an attacker-controlled MIME magic file in a user-writable XDG data location (e.g., in the $XDG_DATA_HOME/mime/magic path) is parsed by an application performing MIME type detection (e.g., via g_content_type_guess()). When performing byte-swap, incorrect pointer arithmetic on the write side causes an out-of-bounds write of 2 bytes, resulting in an application crash or memory corruption.

Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-16118"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-122"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-17T20:17:16Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in xdgmime. A heap-based buffer overflow can be triggered in _xdg_mime_magic_parse_magic_line() in the xdgmimemagic.c file on little-endian systems when an attacker-controlled MIME magic file in a user-writable XDG data location (e.g., in the $XDG_DATA_HOME/mime/magic path) is parsed by an application performing MIME type detection (e.g., via g_content_type_guess()). When performing byte-swap, incorrect pointer arithmetic on the write side causes an out-of-bounds write of 2 bytes, resulting in an application crash or memory corruption.",
  "id": "GHSA-cp7g-r78m-cc2g",
  "modified": "2026-09-21T12:32:32Z",
  "published": "2026-07-17T21:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16118"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64799"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64800"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:66451"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:67956"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-16118"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2501732"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.freedesktop.org/xdg/xdgmime/-/work_items/41"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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