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Fencer Vulns
high 8.8

CVE-2024-56732 json

HarfBuzz heap-buffer-overflow on hb_cairo_glyphs_from_buffer

published 2024-12-27 22 mo ago modified 2026-07-25 3 mo ago also EUVD-2024-53379 , JLSEC-2026-776

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

HarfBuzz is a text shaping engine. Starting with 8.5.0 through 10.0.1, there is a heap-based buffer overflow in the hb_cairo_glyphs_from_buffer function.

Patch / fix

  • julia HarfBuzz_ICU_jll 100.14002.1+0
  • julia HarfBuzz_jll 100.14002.1+0
  • harfbuzz Debian 14, Debian 13 10.1.0-2

debian advisories DEBIAN-CVE-2024-56732

  • harfbuzz Ubuntu 26.04 LTS, Ubuntu 25.10 10.2.0-1

ubuntu advisories UBUNTU-CVE-2024-56732

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • harfbuzz openSUSE Tumbleweed 10.1.0-2.1

opensuse advisories openSUSE-SU-2025:14614-1

  • qtbase Azure Linux 3.0 6.6.3-2
  • harfbuzz Azure Linux 3.0 8.3.0-3

azure linux advisories AZL-54701AZL-54704

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
22 mo ago

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/harfbuzz/harfbuzz/security/advisories/GHSA-qmp9-xqm5-jh6m referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 4.0 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
OSV 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia HarfBuzz_ICU_jll
>=8.5.0+0, <100.14002.1+0
100.14002.1+0
julia HarfBuzz_jll
>=8.5.0+0, <100.14002.1+0
100.14002.1+0

Affected products

  • harfbuzz harfbuzz

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.