PT-2026-3420 · Harfbuzz+1 · Harfbuzz+1

Published 2026-01-19 · Updated 2026-03-04 · CVE-2026-0943

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions HarfBuzz::Shaper versions prior to 0.032

Description HarfBuzz::Shaper versions before 0.032 include a bundled library with a null pointer dereference issue. The vulnerable component is HarfBuzz 8.4.0 or earlier, packaged as hb src.tar.gz within the source tarball. This condition can lead to a program crash or unexpected behavior.

Recommendations Update to HarfBuzz::Shaper version 0.032 or later.

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-1395

CWE-476

Related Identifiers

CVE-2026-0943

Affected Products

Harfbuzz

Harfbuzz::Shaper

References · 12

• https://osv.dev/vulnerability/UBUNTU-CVE-2026-0943 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-0943 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-0943 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-22693 · Security Note
• https://ubuntu.com/security/CVE-2026-0943 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-0943 · Security Note
• https://lists.security.metacpan.org/cve-announce/msg/36208377 · Note
• https://twitter.com/VulmonFeeds/status/2013116855745941852 · Twitter Post
• https://twitter.com/cracbot/status/2015016778834038986 · Twitter Post
• https://t.me/cveNotify/154108 · Telegram Post
• https://bugzilla.redhat.com/show_bug.cgi?id=2429296 · Note
• https://metacpan.org/release/JV/HarfBuzz-Shaper-0.032/changes · Note