Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-27219

CVE-2021-27219HIGH

n/a n/a — An issue was discovered in GNOME GLib before 2.66.6 and 2.67.x before 2.67.3.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0306   87.4     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Feb 15  Reserved by mitre
  Feb 15  Published (CNA: mitre)
  Oct 14  ENRICHED — CVE-2021-27219. Received CVSS 7.5 and CPE data from NVD.
  Oct 14  EXPLOIT PUBLISHED — CVE-2021-27219. Public exploit reference added.

CWE-681 · CNA: mitre · CVSS v3.1 · 8 references · NVD status: Modified

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
February 15, 2021	Reserved	Reserved by mitre
February 15, 2021	Published	Published (CNA: mitre)
October 14, 2026	ENRICHED	ENRICHED — CVE-2021-27219. Received CVSS 7.5 and CPE data from NVD.
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2021-27219. Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-681

References (8)

https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://gitlab.gnome.org/GNOME/glib/-/issues/2319 [Exploit, 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.html [Mailing 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/202107-13 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20210319-0004/ [Third Party Advisory]

Authoritative record: CVE-2021-27219 at cve.org

Weaknesses: CWE-681

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-27219 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.