ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2021-27218

An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4.

Published Feb 15, 2021 · catalog updated Oct 14, 2026 · An issue was discovered

Check if you run it

No confirmed exploitation is on record for CVE-2021-27218. EPSS is 4.08%. Act only if a listed version of An issue was discovered is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (An issue was discovered).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
4.08%
Remediation
Advisory link
Affected products
cpe broadcom/brocade fabric operating system firmware · cpe fedoraproject/fedora · cpe gnome/glib · cpe netapp/active iq unified manager · cpe netapp/cloud backup · cpe netapp/e-series performance analyzer

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe broadcom/brocade fabric operating system firmwareversion unspecified
  • cpe fedoraproject/fedora33
  • cpe fedoraproject/fedora34
  • cpe gnome/glibversion unspecified
  • cpe netapp/active iq unified managerversion unspecified
  • cpe netapp/cloud backupversion unspecified
  • cpe netapp/e-series performance analyzerversion unspecified

How to fix CVE-2021-27218

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-27218. EPSS is 4.08%. Act only if a listed version of An issue was discovered is installed.

Which versions are affected?

Compare what you have installed with 33, 34. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-681. EPSS 4.08%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 15, 2021 · NIST NVD

    Detected

    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.

  2. Oct 14, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2021-27218

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-27218

    30-day exploitation probability 4.1%

    first.org
  • NIST NVDVulnerability recordCVE-2021-27218

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.