GNU glibc up to 2.31 iconv resource consumption

Summaryinfo

A vulnerability classified as problematic was found in GNU glibc up to 2.31. Affected is an unknown function of the component iconv. Such manipulation leads to resource consumption. This vulnerability is traded as CVE-2026-122054. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in GNU glibc up to 2.31. It has been rated as problematic. Affected by this issue is an unknown function of the component iconv. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

Converting crafted BIG-HKSCS input to UCS-4 or the internal wide character encoding, for example with iconv, in the GNU C Library version 2.18 through 2.31 may result in the converter making no progress, causing the calling application to hang.

The advisory is shared for download at sourceware.org. This vulnerability is handled as CVE-2026-122054 since 11/04/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Software Library

Vendor

• GNU

Name

• glibc

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31

License

• open-source

Website

• Vendor: https://www.gnu.org/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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• 🔒
• 🔒

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Entryinfo

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