CVE catalog

CVE-2021-27219

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

[CVE catalog]

Severity: Critical · CVSS 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Feb 4, 2021, 12:00:00 AM UTC
Updated: Oct 14, 2026, 12:17:10 PM UTC
Source: [NVD] · [CVE record]
EPSS: 3.06% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	glib2.0	sid	`2.90.1-2`	fixed
Debian	glib2.0	forky	`2.90.1-2`	fixed
Debian	glib2.0	trixie	`2.84.4-3~deb13u5`	fixed
Debian	glib2.0	bookworm	`2.74.6-2+deb12u9`	fixed
Debian	glib2.0	bookworm-security	`2.74.6-2+deb12u2`	fixed
Cpe	glib	Not reported	`2.66.6`	fixed
Cpe	glib	Not reported	`2.67.3`	fixed
Cpe	fedora	Not reported	Not reported	unknown
Cpe	fedora	Not reported	Not reported	unknown
Cpe	active_iq_unified_manager	Not reported	Not reported	unknown
Cpe	cloud_backup	Not reported	Not reported	unknown
Cpe	e-series_performance_analyzer	Not reported	Not reported	unknown
Cpe	brocade_fabric_operating_system_firmware	Not reported	Not reported	unknown
Cpe	debian_linux	Not reported	Not reported	unknown
Ubuntu	glib2.0	pro	`2.38.0-1ubuntu1`	vulnerable
Ubuntu	glib2.0	pro	`2.38.1-1`	vulnerable
Ubuntu	glib2.0	pro	`2.39.1-0ubuntu1`	vulnerable
Ubuntu	glib2.0	pro	`2.39.1-0ubuntu2`	vulnerable
Ubuntu	glib2.0	pro	`2.39.1-0ubuntu3`	vulnerable
Ubuntu	glib2.0	pro	`2.39.2-0ubuntu1`	vulnerable
Ubuntu	glib2.0	pro	`2.39.2-0ubuntu2`	vulnerable
Ubuntu	glib2.0	pro	`2.39.3-0ubuntu4`	vulnerable
Ubuntu	glib2.0	pro	`2.39.4-0ubuntu1`	vulnerable
Ubuntu	glib2.0	pro	`2.39.90-0ubuntu1`	vulnerable
Ubuntu	glib2.0	pro	`2.39.91-0ubuntu2`	vulnerable
Ubuntu	glib2.0	pro	`2.39.91-0ubuntu3`	vulnerable
Ubuntu	glib2.0	pro	`2.39.92-2`	vulnerable
Ubuntu	glib2.0	pro	`2.40.0-1`	vulnerable
Ubuntu	glib2.0	pro	`2.40.0-1ubuntu1`	vulnerable
Ubuntu	glib2.0	pro	`2.40.0-2`	vulnerable
Ubuntu	glib2.0	pro	`2.40.2-0ubuntu1`	vulnerable
Ubuntu	glib2.0	pro	`2.40.2-0ubuntu1.1`	vulnerable
Ubuntu	glib2.0	pro	`2.40.2-0ubuntu1.1+esm1`	vulnerable
Ubuntu	glib2.0	pro	`2.40.2-0ubuntu1.1+esm2`	vulnerable
Ubuntu	glib2.0	pro	`2.40.2-0ubuntu1.1+esm3`	vulnerable
Ubuntu	glib2.0	pro	`2.40.2-0ubuntu1.1+esm4`	vulnerable
Ubuntu	glib2.0	pro	`2.40.2-0ubuntu1.1+esm6`	vulnerable
Ubuntu	glib2.0	pro	`2.40.2-0ubuntu1.1+esm7`	vulnerable
Ubuntu	glib2.0	pro	`2.40.2-0ubuntu1.1+esm8`	vulnerable
Ubuntu	glib2.0	16.04	`2.46.1-1`	vulnerable
Ubuntu	glib2.0	16.04	`2.46.1-2`	vulnerable
Ubuntu	glib2.0	16.04	`2.47.1-1`	vulnerable
Ubuntu	glib2.0	16.04	`2.47.3-3`	vulnerable
Ubuntu	glib2.0	16.04	`2.47.4-1`	vulnerable
Ubuntu	glib2.0	16.04	`2.47.5-1`	vulnerable
Ubuntu	glib2.0	16.04	`2.47.6-1`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.0-1ubuntu3`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.0-1ubuntu4`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.1-1~ubuntu16.04.1`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.2-0ubuntu1`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.2-0ubuntu3`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.2-0ubuntu4`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.2-0ubuntu4.1`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.2-0ubuntu4.2`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.2-0ubuntu4.3`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.2-0ubuntu4.4`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.2-0ubuntu4.5`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.2-0ubuntu4.6`	vulnerable
Ubuntu	glib2.0	16.04	`2.48.2-0ubuntu4.7`	fixed
Ubuntu	glib2.0	18.04	`2.54.1-1ubuntu1`	vulnerable
Ubuntu	glib2.0	18.04	`2.55.2-2ubuntu1`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.0-2ubuntu1`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.0-4ubuntu1`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.1-2ubuntu1`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.2-0ubuntu0.18.04.1`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.2-0ubuntu0.18.04.2`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.3-0ubuntu0.18.04.1`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.4-0ubuntu0.18.04.2`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.4-0ubuntu0.18.04.3`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.4-0ubuntu0.18.04.4`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.4-0ubuntu0.18.04.5`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.4-0ubuntu0.18.04.6`	vulnerable
Ubuntu	glib2.0	18.04	`2.56.4-0ubuntu0.18.04.7`	fixed
Ubuntu	glib2.0	20.04	`2.62.1-1`	vulnerable
Ubuntu	glib2.0	20.04	`2.63.1-2`	vulnerable
Ubuntu	glib2.0	20.04	`2.63.1-2ubuntu1`	vulnerable
Ubuntu	glib2.0	20.04	`2.63.3-1`	vulnerable
Ubuntu	glib2.0	20.04	`2.63.3-3`	vulnerable
Ubuntu	glib2.0	20.04	`2.63.5-2`	vulnerable
Ubuntu	glib2.0	20.04	`2.64.0-1`	vulnerable
Ubuntu	glib2.0	20.04	`2.64.1-1`	vulnerable
Ubuntu	glib2.0	20.04	`2.64.2-1~fakesync1`	vulnerable
Ubuntu	glib2.0	20.04	`2.64.3-1~ubuntu20.04.1`	vulnerable
Ubuntu	glib2.0	20.04	`2.64.6-1~ubuntu20.04.1`	vulnerable
Ubuntu	glib2.0	20.04	`2.64.6-1~ubuntu20.04.2`	fixed
Alpine	glib	3.13	`2.66.6-r0`	fixed
Alpine	glib	3.14	`2.66.6-r0`	fixed
Alpine	glib	3.15	`2.66.6-r0`	fixed
Alpine	glib	3.16	`2.66.6-r0`	fixed
Alpine	glib	3.17	`2.66.6-r0`	fixed
Alpine	glib	3.18	`2.66.6-r0`	fixed
Alpine	glib	3.19	`2.66.6-r0`	fixed
Alpine	glib	3.20	`2.66.6-r0`	fixed
Alpine	glib	3.21	`2.66.6-r0`	fixed
Alpine	glib	3.22	`2.66.6-r0`	fixed
Alpine	glib	3.23	`2.66.6-r0`	fixed
Alpine	glib	3.24	`2.66.6-r0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	glib2.0	source	sid	`2.66.6-1`	not yet assigned	Not reported	[982778]
Debian	glib2.0	source	forky	`2.66.6-1`	not yet assigned	Not reported	[982778]
Debian	glib2.0	source	trixie	`2.66.6-1`	not yet assigned	Not reported	[982778]
Debian	glib2.0	source	bookworm	`2.66.6-1`	not yet assigned	Not reported	[982778]
Cpe	glib	cpe	Not reported	`2.66.6`	Not reported	NVD-CVE-2021-27219	Not reported
Cpe	glib	cpe	Not reported	`2.67.3`	Not reported	NVD-CVE-2021-27219	Not reported
Ubuntu	glib2.0	deb	16.04	`2.48.2-0ubuntu4.7`	Not reported	UBUNTU-CVE-2021-27219	Not reported
Ubuntu	glib2.0	deb	18.04	`2.56.4-0ubuntu0.18.04.7`	Not reported	UBUNTU-CVE-2021-27219	Not reported
Ubuntu	glib2.0	deb	20.04	`2.64.6-1~ubuntu20.04.2`	Not reported	UBUNTU-CVE-2021-27219	Not reported
Alpine	glib	apk	3.13	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported
Alpine	glib	apk	3.14	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported
Alpine	glib	apk	3.15	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported
Alpine	glib	apk	3.16	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported
Alpine	glib	apk	3.17	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported
Alpine	glib	apk	3.18	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported
Alpine	glib	apk	3.19	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported
Alpine	glib	apk	3.20	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported
Alpine	glib	apk	3.21	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported
Alpine	glib	apk	3.22	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported
Alpine	glib	apk	3.23	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported
Alpine	glib	apk	3.24	`2.66.6-r0`	Not reported	ALPINE-CVE-2021-27219	Not reported

[Debian bug #982778]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libglib2.0-0]Fixed
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · amd64 · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · arm64 · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
[libglib2.0-bin]Fixed
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · amd64 · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · arm64 · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
[libglib2.0-data]Fixed
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · all · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · all · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · all · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · all · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
[libglib2.0-dev]Fixed
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · amd64 · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · arm64 · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
[libglib2.0-dev-bin]Fixed
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · amd64 · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · arm64 · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
[libglib2.0-doc]Fixed
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · all · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · all · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · all · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · all · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
[libglib2.0-tests]Fixed
Source package: [glib2.0]
Details (4)
- 2.74.6-2+deb12u9 · amd64 · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u9 · arm64 · bookworm
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm
- 2.74.6-2+deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 2.66.6-1
  nvd · glib2.0 · debian · bookworm

Observed: Oct 23, 2026, 5:55:20 PM UTC

References

[CERT-Bund public advisories] · [CISA cybersecurity 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]