ubuntu-cve-2025-4373
Vulnerability from osv_ubuntu
Published
2025-05-06 15:16
Modified
2026-04-22 07:53
Summary
Details

A flaw was found in GLib, which is vulnerable to an integer overflow in the g_string_insert_unichar() function. When the position at which to insert the character is large, the position will overflow, leading to a buffer underwrite.

Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libglib2.0-0",
            "binary_version": "2.40.2-0ubuntu1.1+esm7"
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          },
          {
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          },
          {
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            "binary_version": "2.40.2-0ubuntu1.1+esm7"
          },
          {
            "binary_name": "libglib2.0-tests",
            "binary_version": "2.40.2-0ubuntu1.1+esm7"
          }
        ]
      },
      "package": {
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        "name": "glib2.0",
        "purl": "pkg:deb/ubuntu/glib2.0@2.40.2-0ubuntu1.1+esm7?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
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        "2.38.1-1",
        "2.39.1-0ubuntu1",
        "2.39.1-0ubuntu2",
        "2.39.1-0ubuntu3",
        "2.39.2-0ubuntu1",
        "2.39.2-0ubuntu2",
        "2.39.3-0ubuntu4",
        "2.39.4-0ubuntu1",
        "2.39.90-0ubuntu1",
        "2.39.91-0ubuntu2",
        "2.39.91-0ubuntu3",
        "2.39.92-2",
        "2.40.0-1",
        "2.40.0-1ubuntu1",
        "2.40.0-2",
        "2.40.2-0ubuntu1",
        "2.40.2-0ubuntu1.1",
        "2.40.2-0ubuntu1.1+esm1",
        "2.40.2-0ubuntu1.1+esm2",
        "2.40.2-0ubuntu1.1+esm3",
        "2.40.2-0ubuntu1.1+esm4",
        "2.40.2-0ubuntu1.1+esm6",
        "2.40.2-0ubuntu1.1+esm7"
      ]
    },
    {
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            "binary_name": "libglib2.0-0-refdbg",
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          },
          {
            "binary_name": "libglib2.0-bin",
            "binary_version": "2.48.2-0ubuntu4.8+esm5"
          },
          {
            "binary_name": "libglib2.0-data",
            "binary_version": "2.48.2-0ubuntu4.8+esm5"
          },
          {
            "binary_name": "libglib2.0-tests",
            "binary_version": "2.48.2-0ubuntu4.8+esm5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "glib2.0",
        "purl": "pkg:deb/ubuntu/glib2.0@2.48.2-0ubuntu4.8+esm5?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
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        "2.46.1-2",
        "2.47.1-1",
        "2.47.3-3",
        "2.47.4-1",
        "2.47.5-1",
        "2.47.6-1",
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        "2.48.0-1ubuntu4",
        "2.48.1-1~ubuntu16.04.1",
        "2.48.2-0ubuntu1",
        "2.48.2-0ubuntu3",
        "2.48.2-0ubuntu4",
        "2.48.2-0ubuntu4.1",
        "2.48.2-0ubuntu4.2",
        "2.48.2-0ubuntu4.3",
        "2.48.2-0ubuntu4.4",
        "2.48.2-0ubuntu4.5",
        "2.48.2-0ubuntu4.6",
        "2.48.2-0ubuntu4.7",
        "2.48.2-0ubuntu4.8",
        "2.48.2-0ubuntu4.8+esm1",
        "2.48.2-0ubuntu4.8+esm3",
        "2.48.2-0ubuntu4.8+esm4",
        "2.48.2-0ubuntu4.8+esm5"
      ]
    },
    {
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      },
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        "ecosystem": "Ubuntu:Pro:18.04:LTS",
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        "purl": "pkg:deb/ubuntu/glib2.0@2.56.4-0ubuntu0.18.04.9+esm5?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
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        "2.55.2-2ubuntu1",
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        "2.56.2-0ubuntu0.18.04.1",
        "2.56.2-0ubuntu0.18.04.2",
        "2.56.3-0ubuntu0.18.04.1",
        "2.56.4-0ubuntu0.18.04.2",
        "2.56.4-0ubuntu0.18.04.3",
        "2.56.4-0ubuntu0.18.04.4",
        "2.56.4-0ubuntu0.18.04.5",
        "2.56.4-0ubuntu0.18.04.6",
        "2.56.4-0ubuntu0.18.04.7",
        "2.56.4-0ubuntu0.18.04.8",
        "2.56.4-0ubuntu0.18.04.9",
        "2.56.4-0ubuntu0.18.04.9+esm3",
        "2.56.4-0ubuntu0.18.04.9+esm4",
        "2.56.4-0ubuntu0.18.04.9+esm5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libglib2.0-0",
            "binary_version": "2.64.6-1~ubuntu20.04.9"
          },
          {
            "binary_name": "libglib2.0-bin",
            "binary_version": "2.64.6-1~ubuntu20.04.9"
          },
          {
            "binary_name": "libglib2.0-data",
            "binary_version": "2.64.6-1~ubuntu20.04.9"
          },
          {
            "binary_name": "libglib2.0-dev-bin",
            "binary_version": "2.64.6-1~ubuntu20.04.9"
          },
          {
            "binary_name": "libglib2.0-tests",
            "binary_version": "2.64.6-1~ubuntu20.04.9"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "glib2.0",
        "purl": "pkg:deb/ubuntu/glib2.0@2.64.6-1~ubuntu20.04.9?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.64.6-1~ubuntu20.04.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.62.1-1",
        "2.63.1-2",
        "2.63.1-2ubuntu1",
        "2.63.3-1",
        "2.63.3-3",
        "2.63.5-2",
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        "2.64.2-1~fakesync1",
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        "2.64.6-1~ubuntu20.04.6",
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      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libglib2.0-0",
            "binary_version": "2.72.4-0ubuntu2.5"
          },
          {
            "binary_name": "libglib2.0-bin",
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          },
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            "binary_name": "libglib2.0-data",
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    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
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            "binary_name": "gir1.2-girepository-3.0",
            "binary_version": "2.80.0-6ubuntu3.4"
          },
          {
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          },
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          {
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      },
      "package": {
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        "name": "glib2.0",
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      },
      "ranges": [
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          "type": "ECOSYSTEM"
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      "versions": [
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        "2.78.1-4",
        "2.78.3-1",
        "2.78.3-2",
        "2.79.1-1",
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        "2.80.0-6ubuntu3",
        "2.80.0-6ubuntu3.1",
        "2.80.0-6ubuntu3.2"
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    }
  ],
  "aliases": [],
  "details": "A flaw was found in GLib, which is vulnerable to an integer overflow in the g_string_insert_unichar() function. When the position at which to insert the character is large, the position will overflow, leading to a buffer underwrite.",
  "id": "UBUNTU-CVE-2025-4373",
  "modified": "2026-04-22T07:53:18Z",
  "published": "2025-05-06T15:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-4373"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-4373"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/GNOME/glib/-/issues/3677"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4588"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4592"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-4373"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2364265"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7532-1"
    }
  ],
  "related": [
    "USN-7532-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-4373"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.