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Vulnerability record · CVE-2021-27219 · published 15 February 2021

CVE-2021-27219: Gnome glib vulnerability

Gnome · Glib

An issue was discovered in GNOME GLib before 2.66.6 and 2.67.x before 2.67.3. The function g_bytes_new has an integer overflow on 64-bit platforms due to an implicit cast from 64 bits to 32 bits. The overflow could potentially lead to memory corruption.

7.5 CVSS 3.1 High EPSS 3.0% · top 13.0% CWE-681 · CWE-681
7.5CVSS 3.1 base score, v2 5.0
3.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
14References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in GNOME GLib before 2.66.6 and 2.67.x before 2.67.3. The function g_bytes_new has an integer overflow on 64-bit platforms due to an implicit cast from 64 bits to 32 bits. The overflow could potentially lead to memory corruption.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gitlab.gnome.org/GNOME/glib/-/issues/2319 ExploitIssue TrackingThird Party Advisory
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%
https://lists.debian.org/debian-lts-announce/2022/06/msg00006.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2REA7RVKN7ZHRLJOEGBRQKJ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJMPNDO4GDVURYQFYKFOWY5
https://security.gentoo.org/glsa/202107-13 Third Party Advisory
https://security.netapp.com/advisory/ntap-20210319-0004/ Third Party Advisory
https://gitlab.gnome.org/GNOME/glib/-/issues/2319 ExploitIssue TrackingThird Party Advisory
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%
https://lists.debian.org/debian-lts-announce/2022/06/msg00006.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2REA7RVKN7ZHRLJOEGBRQKJ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJMPNDO4GDVURYQFYKFOWY5
https://security.gentoo.org/glsa/202107-13 Third Party Advisory
https://security.netapp.com/advisory/ntap-20210319-0004/ Third Party Advisory

Track CVE-2021-27219 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-27219), CISA KEV, FIRST EPSS (scores of 2026-10-12). This page is refreshed as NVD updates the record.