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CVE-2021-42614: A use after free in info_width_internal in bk_info.c in Halibut 1.2 allows an attacker to cause a segmentat...

A use after free in info_width_internal in bk_info.c in Halibut 1.2 allows an attacker to cause a segmentation fault or possibly have unspecified other impact via a crafted text document.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Halibut 1.2 can crash, and may have unspecified additional impact, when processing a maliciously crafted text document. Business risk is most relevant where this tool handles documents from untrusted sources. The provided sources do not show active exploitation or a confirmed vendor patch beyond Fedora package advisory context.

Executive priority

Prioritize if Halibut is used in automated document processing or accepts external files. For most organizations, urgency is moderate because exposure is likely niche and active exploitation is not evidenced in the supplied sources.

Technical view

CVE-2021-42614 is a use-after-free in info_width_internal in bk_info.c in Halibut 1.2. The CVE description links the flaw to crafted text document processing, causing segmentation fault or possible unspecified impact. No CVSS, CWE, CPE, or detailed affected product metadata is provided.

Likely exposure

Exposure appears limited to environments running Halibut 1.2, especially automated or user-facing document processing workflows that accept untrusted text documents. The source bundle does not identify broader affected versions, CPEs, or packaged distributions beyond a Fedora advisory reference.

Exploitation context

The provided CVE data describes a crafted-document trigger and references a public case study. KEV is false, and no supplied source states active exploitation in the wild. Treat this as a denial-of-service risk with uncertain memory-corruption impact until vendor or distributor guidance clarifies scope.

Researcher notes

Evidence is thin: no CVSS, CWE, CPEs, or complete affected-version range are provided. The key technical fact is a use-after-free in bk_info.c during crafted text document handling. Validate impact against the public case study and distributor advisories before asserting exploitability beyond crash behavior.

Mitigation direction

  • Identify any Halibut 1.2 installations or packages in build and documentation pipelines.
  • Review Fedora and upstream guidance for fixed package versions or recommended updates.
  • Avoid processing untrusted Halibut input documents until patched or isolated.
  • Run document processing in a constrained environment with minimal privileges.

Validation and detection

  • Inventory package managers, build images, and documentation tooling for Halibut 1.2.
  • Check whether any workflow processes externally supplied text documents with Halibut.
  • Compare installed packages against Fedora advisory information where applicable.
  • Confirm compensating isolation for any remaining unpatched processing paths.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2021-42614 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.