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No exploitation reportedFix available

CVE-2021-3800

No exploitation reported by the sources we read.

  • Published2022-08-23
  • Fixed in2.63.6 · 2.62.5
  • WeaknessCWE-200 · CWE-552

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A flaw was found in glib before version 2.63.6. Due to random charset alias, pkexec can leak content from files owned by privileged users to unprivileged ones under the right condition.

Timeline

dates in UTC
  1. 2022-08-2316:15CVE publishedNVD

Versions per branch

NVD
Gnome glib
BranchAffectedFixed in
2.63≥ 2.63.0, < 2.63.62.63.6
2.62< 2.62.52.62.5
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
Netapp active iq unified manager
BranchAffectedFixed in
—all versionsno fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • glib2TuxCare:OracleLinux:6all versions · fixed in 2.28.8-12.el6.tuxcare.els3and 3 other packages
  • glib2TuxCare:CentOS:8.4all versions · fixed in 2.56.4-10.el8.4.1.tuxcare.els1and 5 other packages
  • glib2TuxCare:CentOS:6all versions · fixed in 2.28.8-12.el6.tuxcare.els3and 3 other packages
  • glib2SUSE:Linux Enterprise Workstation Extension 12 SP5all versions · fixed in 2.48.2-12.25.1
  • glib2SUSE:Linux Enterprise Software Development Kit 12 SP5all versions · fixed in 2.48.2-12.25.1
  • glib2SUSE:Linux Enterprise Server for SAP Applications 12 SP5all versions · fixed in 2.48.2-12.25.1
  • glib2SUSE:Linux Enterprise Server 12 SP5all versions · fixed in 2.48.2-12.25.1
  • glib2Rocky Linux:8all versions · fixed in 0:2.56.4-156.el8

11 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-3800 Red Hat Product Security100 products fixed · 18 known affected

    glib2: Possible privilege escalation thourgh pkexec and aliases

    firefox as a component of Red Hat Enterprise Linux 6 · firefox.src as a component of Red Hat Enterprise Linux 6 · glib2 as a component of Red Hat Enterprise Linux 6 · +15 more

  • RHSA-2021:4385 Red Hat Product Security75 products fixed

    Red Hat Security Advisory: glib2 security and bug fix update

Full record on NVD

Fix

  1. Update Gnome glib to 2.63.6 · 2.62.5
  2. Vendor fix Red Hat Product Security RHSA-2021:4385 · 75 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  3. No fix planned, says the vendor Red Hat Product Security CVE-2021-3800 · 16 productsOut of support scope
  4. No fix planned, says the vendor Red Hat Product Security CVE-2021-3800 · 2 productsWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.15.5read 2026-10-23
  • CNAweakness (CWE)CWE-200known since 2026-10-23
  • NVDweakness (CWE)CWE-552read 2026-10-23
  • FIRST EPSSEPSS score0.6 %2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Published
2022-08-23
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-58w9-h6f7-f979

Frequently asked questions

What is CVE-2021-3800?

A flaw was found in glib before version 2.63.6. Due to random charset alias, pkexec can leak content from files owned by privileged users to unprivileged ones under the right condition.

Is CVE-2021-3800 actively exploited?

Active exploitation of CVE-2021-3800 has not been confirmed. Its EPSS score was 0.6% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-3800?

CVE-2021-3800 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

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Sources for this record