CVE-2026-122054 | BDVDB-2026-400410 Detail

The GNU C Libraryglibc

Description#

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.

Impact#

CAPEC-153 Input Data Manipulation

Weaknesses#

CWE-835 Loop with unreachable exit condition ('infinite loop')

References#

Exploit#

No public exploit known

History#

Version 12026-11-04Record published in the CVE List.
Version 22026-11-09Most recent update recorded in the CVE List.

Published

Published: 2026-11-04
Last modified: 2026-11-09

Vendor information

Vendor: The GNU C Library
Product: glibc

All The GNU C Library vulnerabilities

Score

5.9 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 39.1.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2.18 and <= 2.31
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

5.9 Medium

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).