USN-8794-1 (UBUNTU-CVE-2026-15588)

Vulnerability from osv_ubuntu – Published: 2026-09-21 16:25 – Updated: 2026-09-21 16:25 – Source website
VLAI
Summary
glib2.0 vulnerabilities
Details

It was discovered that GLib's GDBus authentication mechanism failed to enforce length limitations on data lines read from a client. An unauthenticated attacker could exploit this to cause a denial of service via resource exhaustion. (CVE-2026-15588)

It was discovered that the xdgmime library in GLib had a heap-based buffer overflow. An attacker-controlled MIME magic file could cause an out-of-bounds write on little-endian systems. (CVE-2026-16118)

It was discovered that GLib had an off-by-one error in the GVariant serialiser. An attacker could use this to cause an out-of-bounds read, leading to information disclosure or a denial of service. (CVE-2026-58010)

It was discovered that GLib had an out-of-bounds read in GDateTime. An attacker could use this to corrupt date output and cause a denial of service. (CVE-2026-58011)

It was discovered that GLib's g_regex_replace() function had a buffer over-read when used with the G_REGEX_RAW flag. An attacker could use this to cause information disclosure or a denial of service. (CVE-2026-58012)

It was discovered that GLib's GIOChannel had a buffer over-read when using a custom line terminator. An attacker could use this to cause information disclosure or a denial of service. (CVE-2026-58013)

It was discovered that GLib's GKeyFile had an off-by-one error when loading a key file with an empty value. An attacker could use this to cause an out-of-bounds access or a denial of service. (CVE-2026-58014)

It was discovered that GLib's DBUS_COOKIE_SHA1 authentication mechanism failed to validate the cookie_context parameter. A malicious D-Bus server could use this to read arbitrary files from the client. (CVE-2026-58015)

It was discovered that GLib's D-Bus introspection XML parser had a state confusion issue. An attacker could use this to cause an out-of-bounds read and denial of service. (CVE-2026-58016)

References
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                },
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                  "type": "Ubuntu"
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                  "type": "CVSS_V3"
                },
                {
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                  "score": "medium",
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                }
              ]
            },
            {
              "id": "CVE-2026-58011",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-58012",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-58013",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-58014",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-58015",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-58016",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-girepository-3.0",
            "binary_version": "2.88.0-1ubuntu0.1"
          },
          {
            "binary_name": "gir1.2-glib-2.0",
            "binary_version": "2.88.0-1ubuntu0.1"
          },
          {
            "binary_name": "girepository-tools",
            "binary_version": "2.88.0-1ubuntu0.1"
          },
          {
            "binary_name": "libgio-2.0-dev-bin",
            "binary_version": "2.88.0-1ubuntu0.1"
          },
          {
            "binary_name": "libgirepository-2.0-0",
            "binary_version": "2.88.0-1ubuntu0.1"
          },
          {
            "binary_name": "libglib2.0-0t64",
            "binary_version": "2.88.0-1ubuntu0.1"
          },
          {
            "binary_name": "libglib2.0-bin",
            "binary_version": "2.88.0-1ubuntu0.1"
          },
          {
            "binary_name": "libglib2.0-data",
            "binary_version": "2.88.0-1ubuntu0.1"
          },
          {
            "binary_name": "libglib2.0-dev-bin",
            "binary_version": "2.88.0-1ubuntu0.1"
          },
          {
            "binary_name": "libglib2.0-tests",
            "binary_version": "2.88.0-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "glib2.0",
        "purl": "pkg:deb/ubuntu/glib2.0@2.88.0-1ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.88.0-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.86.0-2",
        "2.86.1-1",
        "2.86.1-2",
        "2.86.2-1",
        "2.86.3-1",
        "2.86.3-4",
        "2.87.2-2",
        "2.87.2-3",
        "2.87.3-1",
        "2.88.0-1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that GLib\u0027s GDBus authentication mechanism failed to\nenforce length limitations on data lines read from a client. An\nunauthenticated attacker could exploit this to cause a denial of service\nvia resource exhaustion. (CVE-2026-15588)\n\nIt was discovered that the xdgmime library in GLib had a heap-based\nbuffer overflow. An attacker-controlled MIME magic file could cause an\nout-of-bounds write on little-endian systems. (CVE-2026-16118)\n\nIt was discovered that GLib had an off-by-one error in the GVariant\nserialiser. An attacker could use this to cause an out-of-bounds read,\nleading to information disclosure or a denial of service.\n(CVE-2026-58010)\n\nIt was discovered that GLib had an out-of-bounds read in GDateTime. An\nattacker could use this to corrupt date output and cause a denial of\nservice. (CVE-2026-58011)\n\nIt was discovered that GLib\u0027s g_regex_replace() function had a buffer\nover-read when used with the G_REGEX_RAW flag. An attacker could use\nthis to cause information disclosure or a denial of service.\n(CVE-2026-58012)\n\nIt was discovered that GLib\u0027s GIOChannel had a buffer over-read when\nusing a custom line terminator. An attacker could use this to cause\ninformation disclosure or a denial of service. (CVE-2026-58013)\n\nIt was discovered that GLib\u0027s GKeyFile had an off-by-one error when\nloading a key file with an empty value. An attacker could use this to\ncause an out-of-bounds access or a denial of service. (CVE-2026-58014)\n\nIt was discovered that GLib\u0027s DBUS_COOKIE_SHA1 authentication mechanism\nfailed to validate the cookie_context parameter. A malicious D-Bus\nserver could use this to read arbitrary files from the client.\n(CVE-2026-58015)\n\nIt was discovered that GLib\u0027s D-Bus introspection XML parser had a\nstate confusion issue. An attacker could use this to cause an\nout-of-bounds read and denial of service. (CVE-2026-58016)",
  "id": "USN-8794-1",
  "modified": "2026-09-21T16:25:01Z",
  "published": "2026-09-21T16:25:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8794-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-15588"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-16118"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-58010"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-58011"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-58012"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-58013"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-58014"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-58015"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-58016"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "glib2.0 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-15588",
    "UBUNTU-CVE-2026-16118",
    "UBUNTU-CVE-2026-58010",
    "UBUNTU-CVE-2026-58011",
    "UBUNTU-CVE-2026-58012",
    "UBUNTU-CVE-2026-58013",
    "UBUNTU-CVE-2026-58014",
    "UBUNTU-CVE-2026-58015",
    "UBUNTU-CVE-2026-58016"
  ]
}



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Sightings

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Nomenclature

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    Related by attack behaviour

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