High severity7.5NVD Advisory· Published Nov 4, 2021· Updated Jun 17, 2026
CVE-2021-43396
CVE-2021-43396
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
13- cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:22.1.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.1.2:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.1.2:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:22.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_unified_data_repository:22.2.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_operations_monitor:4.3:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:oracle:enterprise_operations_monitor:4.3:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:enterprise_operations_monitor:4.4:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:enterprise_operations_monitor:5.0:*:*:*:*:*:*:*
- glibc/GNU C Librarydescription
Patches
Vulnerability mechanics
References
4- www.oracle.com/security-alerts/cpujul2022.htmlnvdPatchThird Party Advisory
- blog.tuxcare.com/vulnerability/vulnerability-in-iconv-identified-by-tuxcare-team-cve-2021-43396nvdExploitThird Party Advisory
- sourceware.org/bugzilla/show_bug.cginvdExploitIssue TrackingThird Party Advisory
- sourceware.org/git/nvd
News mentions
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