CVE-2021-27219

Name: CVE-2021-27219
Creator: NVD / NIST
Published: 2021-02-15T17:15:13.137+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.99%

Last modified Jun 17, 2026

CVE-2021-27219 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 2.99% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.99%

85.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-681

Affected Software

Vendor	Product	Versions
Gnome	Glib	< 2.66.6
Gnome	Glib	>= 2.67.0, < 2.67.3
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34
Netapp	Active Iq Unified Manager	All versions
Netapp	Cloud Backup	All versions
Netapp	E-Series Performance Analyzer	All versions
Broadcom	Brocade Fabric Operating System Firmware	All versions
Debian	Debian Linux	9.0

References

https://gitlab.gnome.org/GNOME/glib/-/issues/2319Exploit, Issue Tracking, Third Party Advisory
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
https://lists.debian.org/debian-lts-announce/2022/06/msg00006.htmlMailing List, Third Party Advisory
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://security.gentoo.org/glsa/202107-13Third Party Advisory
https://security.netapp.com/advisory/ntap-20210319-0004/Third Party Advisory
https://gitlab.gnome.org/GNOME/glib/-/issues/2319Exploit, Issue Tracking, Third Party Advisory
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
https://lists.debian.org/debian-lts-announce/2022/06/msg00006.htmlMailing List, Third Party Advisory
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://security.gentoo.org/glsa/202107-13Third Party Advisory
https://security.netapp.com/advisory/ntap-20210319-0004/Third Party Advisory

Timeline

Published: Feb 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27219?

How severe is CVE-2021-27219?

CVE-2021-27219 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.99% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27219?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27219?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST