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Back to active CVEs
Medium · CVSS 5.9CVE-2026-122054

BIG-HKSCS decoding hang on crafted inputCVE-2026-122054

Answer in brief

CVE-2026-122054 records a Medium severity (CVSS 5.9) vulnerability in BIG-HKSCS decoding hang on crafted input. The current sources do not mark it as known exploited. The current feed maps The GNU C Library/glibc (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 4, 2026Updated Nov 4, 2026Source checked Nov 4, 2026First seen by HOL Nov 4, 2026Material review Nov 4, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 5.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps The GNU C Library/glibc (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
The GNU C Library/glibcgeneric>=2.18 <=2.31Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for The GNU C Library/glibc.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 4, 2026

Sources and claim methodology

  • Source referencesourceware.org
  • Source referencesourceware.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • FreeRDP before 3.32.2 Infinite Loop via Truncated WebSocket FrameAlso CWE-835

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-835
Source
CVE List V5
Source checked
Nov 4, 2026
References
2 linked sources
Open source record