CVE-2026-0943
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-19

Last updated on: 2026-03-04

Assigner: CPANSec

Description
HarfBuzz::Shaper versions before 0.032 for Perl contains a bundled library with a null pointer dereference vulnerability.  Versions before 0.032 contain HarfBuzz 8.4.0 or earlier bundled as hb_src.tar.gz in the source tarball, which is affected by CVE-2026-22693.
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Meta Information
Published
2026-01-19
Last Modified
2026-03-04
Generated
2026-06-16
AI Q&A
2026-01-19
EPSS Evaluated
2026-06-15
NVD
CVE-2026-0943
EUVD
EUVD-2026-3246
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
jv harfbuzz to 0.032 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Executive Summary

This vulnerability is a null pointer dereference in the perl-HarfBuzz-Shaper package, specifically within the bundled HarfBuzz library used for text shaping. When the affected code dereferences a null pointer, it can cause the program to crash or result in a denial of service. [1]

Impact Analysis

The vulnerability can cause the affected software to crash or become unavailable due to a denial of service condition triggered by the null pointer dereference. This can disrupt normal operations of applications relying on the HarfBuzz library for text shaping. [1]

Detection Guidance

This vulnerability can be detected by checking the version of the perl-HarfBuzz-Shaper package installed on your system. Versions before 0.032 are vulnerable. On Fedora systems, you can use the package manager to query the installed version with commands like 'rpm -q perl-HarfBuzz-Shaper' or 'dnf list installed perl-HarfBuzz-Shaper'. There are no specific network detection commands provided. [1]

Mitigation Strategies

To mitigate this vulnerability, immediately upgrade the perl-HarfBuzz-Shaper package to version 0.032-1.fc42 or later on Fedora 42, or 0.032-2.fc43 or later on Fedora 43. This can be done by enabling the updates-testing repository and installing the updates using the Fedora package manager with the advisories FEDORA-2026-55dfa04750 (Fedora 42) and FEDORA-2026-c7954c45b7 (Fedora 43). [1]

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