High
Security advisory
An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. If g_byte_array_new_take() was called with a buffer of 4GB or more on a 64-bit platform, the length would be truncated modulo 2**32, causing unintended length truncation.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-27218
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:55 UTC · Revision 1
Source evidence
An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. If g_byte_array_new_take() was called with a buffer of 4GB or more on a 64-bit platform, the length would be truncated modulo 2**32, causing unintended length truncation.
osv:CVE-2021-27218
Complete source record
{
"id": "f052c776b4ae7bb1cd3b64bb7dbe3b28836214673b4016c3db12e1ba2cc34158",
"url": "https://osv.dev/vulnerability/CVE-2021-27218",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-27218",
"summary": "An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. If g_byte_array_new_take() was called with a buffer of 4GB or more on a 64-bit platform, the length would be truncated modulo 2**32, causing unintended length truncation.",
"evidence": "osv:CVE-2021-27218",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2021-27218",
"aliases": [
"CVE-2021-27218"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
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"GLIB_1_3_4",
"GLIB_1_3_3",
"GLIB_1_2_9PRE1",
"GLIB_1_3_2",
"GNOME_PRINT_0_24",
"GLIB_1_3_1",
"GLIB_1_3_0",
"GLIB_1_2_0",
"GLIB_1_1_16",
"GLIB_1_1_15",
"GLIB_1_1_14",
"GLIB_1_1_13",
"GLIB_1_1_12",
"GLIB_1_1_11",
"GLIB_1_1_10",
"GLIB_GNOME_0_99_1",
"FOR_GNOME_0_99_1",
"GLIB_1_1_9",
"GLIB_1_1_8a",
"GLIB_1_1_8",
"GLIB_1_1_7",
"GLIB_1_1_6",
"PRE_CLEANUP",
"GLIB_1_1_5",
"GLIB_1_1_4",
"GLIB_VERSION_1_1_3",
"GLIB_1_1_3a",
"GLIB_1_1_3",
"GLIB_1_1_2",
"GLIB_1_1_1",
"GLIB_1_1_0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27218.json"
}
}
],
"modified": "2026-10-24T10:30:23.134388623Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
"https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E",
"https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E",
"https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2REA7RVKN7ZHRLJOEGBRQKJIPZQPAELZ/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJMPNDO4GDVURYQFYKFOWY5HAF4FTEPN/",
"https://lists.debian.org/debian-lts-announce/2022/06/msg00006.html",
"https://security.gentoo.org/glsa/202107-13",
"https://security.netapp.com/advisory/ntap-20210319-0004/",
"https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1942",
"https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1944"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "33"
},
{
"last_affected": "33"
},
{
"introduced": "34"
},
{
"last_affected": "34"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-27218",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 430837,
"published_at": "2021-02-15T17:15:13.073+00:00"
}