CVE catalog

CVE-2026-58012

A flaw was found in GLib. A buffer over-read can occur…

A flaw was found in GLib. A buffer over-read can occur in the g_regex_replace function when used with the `G_REGEX_RAW` compile flag and case-change replacement escapes because the string_append function processes matched substrings using UTF-8 functions that assume valid UTF-8 input, even when the string is treated as raw bytes. This vulnerability can cause a minor information disclosure of 1-5 bytes and a denial of service when the buffer over-read crosses a page boundary.

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Mar 27, 2026, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.49% · Oct 27, 2026

Projects and upstream resources

[glib2.0][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence

Original provider fields

{
  "package_releases": [
    {
      "name": "glib2.0",
      "status": "fixed",
      "release": "sid",
      "version": "2.90.1-2"
    },
    {
      "name": "glib2.0",
      "status": "fixed",
      "release": "forky",
      "version": "2.90.1-2"
    },
    {
      "name": "glib2.0",
      "status": "fixed",
      "release": "trixie",
      "version": "2.84.4-3~deb13u5"
    },
    {
      "name": "glib2.0",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "2.74.6-2+deb12u9"
    },
    {
      "name": "glib2.0",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "2.74.6-2+deb12u2"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "glib2.0",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "2.88.1-2"
    },
    {
      "bug": null,
      "name": "glib2.0",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "2.88.1-2"
    },
    {
      "bug": null,
      "name": "glib2.0",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "2.84.4-3~deb13u4"
    },
    {
      "bug": null,
      "name": "glib2.0",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "glib2.0",
      "ecosystem": "cpe",
      "fixed_version": "not yet fixed"
    },
    {
      "name": "glib",
      "ecosystem": "cpe",
      "fixed_version": "2.86.5"
    },
    {
      "name": "glib",
      "ecosystem": "cpe",
      "fixed_version": ""
    },
    {
      "name": "enterprise_linux",
      "ecosystem": "cpe",
      "fixed_version": ""
    },
    {
      "name": "glib",
      "ranges": [],
      "ecosystem": "cpe",
      "fixed_version": "",
      "provider_record_id": "NVD-CVE-2026-58012"
    },
    {
      "name": "enterprise_linux",
      "ranges": [],
      "ecosystem": "cpe",
      "fixed_version": "",
      "provider_record_id": "NVD-CVE-2026-58012"
    },
    {
      "name": "glib2.0",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "gir1.2-girepository-3.0",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "gir1.2-girepository-3.0-dev",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "gir1.2-glib-2.0",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "gir1.2-glib-2.0-dev",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "libgirepository-2.0-0",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "libgirepository-2.0-dev",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "libglib2.0-0t64",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "libglib2.0-bin",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "libglib2.0-data",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "libglib2.0-dev",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "libglib2.0-dev-bin",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "libglib2.0-doc",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "libglib2.0-tests",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.80.0-6ubuntu3.9",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9"
    },
    {
      "name": "glib2.0",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.64.6-1~ubuntu20.04.9+esm2"
            }
          ]
        }
      ],
      "release": "pro",
      "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",
        "2.64.0-1",
        "2.64.1-1",
        "2.64.2-1~fakesync1",
        "2.64.3-1~ubuntu20.04.1",
        "2.64.6-1~ubuntu20.04.1",
        "2.64.6-1~ubuntu20.04.2",
        "2.64.6-1~ubuntu20.04.3",
        "2.64.6-1~ubuntu20.04.4",
        "2.64.6-1~ubuntu20.04.6",
        "2.64.6-1~ubuntu20.04.7",
        "2.64.6-1~ubuntu20.04.8",
        "2.64.6-1~ubuntu20.04.9",
        "2.64.6-1~ubuntu20.04.9+esm1"
      ],
      "ecosystem": "deb",
      "fixed_version": "2.64.6-1~ubuntu20.04.9+esm2",
      "provider_record_id": "UBUNTU-CVE-2026-58012"
    },
    {
      "name": "glib2.0",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.72.4-0ubuntu2.10"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "2.68.4-1ubuntu1",
        "2.70.1-1",
        "2.70.2-1",
        "2.71.0-2",
        "2.71.1-1",
        "2.71.2-1",
        "2.71.3-1",
        "2.72.0-1",
        "2.72.1-1",
        "2.72.4-0ubuntu1",
        "2.72.4-0ubuntu2",
        "2.72.4-0ubuntu2.2",
        "2.72.4-0ubuntu2.3",
        "2.72.4-0ubuntu2.4",
        "2.72.4-0ubuntu2.5",
        "2.72.4-0ubuntu2.6",
        "2.72.4-0ubuntu2.7",
        "2.72.4-0ubuntu2.8",
        "2.72.4-0ubuntu2.9"
      ],
      "ecosystem": "deb",
      "fixed_version": "2.72.4-0ubuntu2.10",
      "provider_record_id": "UBUNTU-CVE-2026-58012"
    },
    {
      "name": "glib2.0",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.80.0-6ubuntu3.9"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "2.78.0-2",
        "2.78.1-4",
        "2.78.3-1",
        "2.78.3-2",
        "2.79.1-1",
        "2.79.2-1~ubuntu1",
        "2.79.3-3ubuntu5",
        "2.80.0-6ubuntu1",
        "2.80.0-6ubuntu3",
        "2.80.0-6ubuntu3.1",
        "2.80.0-6ubuntu3.2",
        "2.80.0-6ubuntu3.4",
        "2.80.0-6ubuntu3.5",
        "2.80.0-6ubuntu3.6",
        "2.80.0-6ubuntu3.7",
        "2.80.0-6ubuntu3.8"
      ],
      "ecosystem": "deb",
      "fixed_version": "2.80.0-6ubuntu3.9",
      "provider_record_id": "UBUNTU-CVE-2026-58012"
    },
    {
      "name": "glib2.0",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "25.10",
      "versions": [
        "2.84.1-1",
        "2.84.1-2",
        "2.84.2-1",
        "2.84.3-1",
        "2.85.1-2",
        "2.85.2-2",
        "2.85.3-1",
        "2.86.0-2",
        "2.86.0-2ubuntu0.1",
        "2.86.0-2ubuntu0.2",
        "2.86.0-2ubuntu0.3"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-58012"
    },
    {
      "name": "glib2.0",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.88.0-1ubuntu0.1"
            }
          ]
        }
      ],
      "release": "26.04",
      "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"
      ],
      "ecosystem": "deb",
      "fixed_version": "2.88.0-1ubuntu0.1",
      "provider_record_id": "UBUNTU-CVE-2026-58012"
    }
  ]
}

Publisher notes

[bookworm] glib2.0: Minor issue; g_regex_replace raw-mode over-read, needs G_REGEX_RAW

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libglib2.0-0]Unknown
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · amd64 · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · arm64 · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · amd64 · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · arm64 · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
[libglib2.0-bin]Unknown
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · amd64 · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · arm64 · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · amd64 · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · arm64 · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
[libglib2.0-data]Unknown
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · all · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · all · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · all · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · all · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
[libglib2.0-dev]Unknown
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · amd64 · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · arm64 · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · amd64 · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · arm64 · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
[libglib2.0-dev-bin]Unknown
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · amd64 · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · arm64 · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · amd64 · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · arm64 · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
[libglib2.0-doc]Unknown
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · all · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · all · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · all · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · all · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
[libglib2.0-tests]Unknown
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · amd64 · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · arm64 · bookworm
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · amd64 · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · arm64 · bookworm-security
  Affected
  nvd · glib2.0 · debian · bookworm

Observed: Oct 23, 2026, 9:45:19 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]