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TI-2021-19341 Aliases CVE-2021-43396GHSA-73g2-m4v3-6c2h

In iconvdata/iso-2022-jp-3.c in the GNU C Library (aka glibc) 2.34, remote attackers can…

Priority LOW 39Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

In iconvdata/iso-2022-jp-3.c in the GNU C Library (aka glibc) 2.34, remote attackers can force iconv() to emit a spurious '\0' character via crafted ISO-2022-JP-3 data that is accompanied by an internal state reset. This may affect data integrity in certain iconv() use cases. NOTE: the vendor states "the bug cannot be invoked through user input and requires iconv to be invoked with a NULL inbuf, which ought to require a separate application bug to do so unintentionally. Hence there's no security impact to the bug.

Why it matters now

EPSS 0.03293 88th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 10

CPEVersionsRoleVendor
cpe:2.3:a:gnu:glibc:2.34:*:*:*:*:*:*:*2.34VulnerableGNU
cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*22.1.3VulnerableOracle
cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:22.1.0:*:*:*:*:*:*:*22.1.0VulnerableOracle
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.1.2:*:*:*:*:*:*:*22.1.2VulnerableOracle
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.2.0:*:*:*:*:*:*:*22.2.0VulnerableOracle
cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:22.1.1:*:*:*:*:*:*:*22.1.1VulnerableOracle
cpe:2.3:a:oracle:communications_cloud_native_core_unified_data_repository:22.2.0:*:*:*:*:*:*:*22.2.0VulnerableOracle
cpe:2.3:a:oracle:enterprise_operations_monitor:4.3:*:*:*:*:*:*:*4.3VulnerableOracle
cpe:2.3:a:oracle:enterprise_operations_monitor:4.4:*:*:*:*:*:*:*4.4VulnerableOracle
cpe:2.3:a:oracle:enterprise_operations_monitor:5.0:*:*:*:*:*:*:*5.0VulnerableOracle
  • cpe:2.3:a:gnu:glibc:2.34:*:*:*:*:*:*:* Versions 2.34 Vulnerable ·GNU
  • cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:* Versions 22.1.3 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:22.1.0:*:*:*:*:*:*:* Versions 22.1.0 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.1.2:*:*:*:*:*:*:* Versions 22.1.2 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.2.0:*:*:*:*:*:*:* Versions 22.2.0 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:22.1.1:*:*:*:*:*:*:* Versions 22.1.1 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:communications_cloud_native_core_unified_data_repository:22.2.0:*:*:*:*:*:*:* Versions 22.2.0 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:enterprise_operations_monitor:4.3:*:*:*:*:*:*:* Versions 4.3 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:enterprise_operations_monitor:4.4:*:*:*:*:*:*:* Versions 4.4 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:enterprise_operations_monitor:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Oracle

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43396
  2. 2026-10-03 Alias added: GHSA-73g2-m4v3-6c2h

References

Exploit 2

Patch 1

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences