How severe is CVE-2024-56732?

CVE-2024-56732 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-56732 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-56732?

CVE-2024-56732 affects Harfbuzz Project Harfbuzz. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-56732?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-56732 have an EU (EUVD) identifier?

Yes. CVE-2024-56732 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-53379.

When was CVE-2024-56732 published?

CVE-2024-56732 was published on 2024-12-27 and last updated on 2026-06-25.

CVE-2024-56732

CVE-2024-56732 is a high-severity vulnerability in Harfbuzz Project Harfbuzz with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 9.3
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-53379
Weakness: CWE-122
Affected product: Harfbuzz Project Harfbuzz
Published: 2024-12-27
Last modified: 2026-06-25

Description

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.

Frequently asked questions

What is CVE-2024-56732?: 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.
How severe is CVE-2024-56732?: CVE-2024-56732 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-56732 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-56732?: CVE-2024-56732 affects Harfbuzz Project Harfbuzz. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-56732?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-56732 have an EU (EUVD) identifier?: Yes. CVE-2024-56732 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-53379.
When was CVE-2024-56732 published?: CVE-2024-56732 was published on 2024-12-27 and last updated on 2026-06-25.

References

Affected products (1)

cpe:2.3:a:harfbuzz_project:harfbuzz:*:*:*:*:*:*:*:*

More vulnerabilities in Harfbuzz Project Harfbuzz

CVE-2015-8947 — High (CVSS 7.6): hb-ot-layout-gpos-table.hh in HarfBuzz before 1.0.5 allows remote attackers to cause a denial of service (buffer…
CVE-2016-2052 — High (CVSS 7.6): Multiple unspecified vulnerabilities in HarfBuzz before 1.0.6, as used in Google Chrome before 48.0.2564.82, allow…
CVE-2023-25193 — High (CVSS 7.5): hb-ot-layout-gsubgpos.hh in HarfBuzz through 6.0.0 allows attackers to trigger O(n^2) growth via consecutive marks…
CVE-2021-45931 — Medium (CVSS 6.5): HarfBuzz 2.9.0 has an out-of-bounds write in hb_bit_set_invertible_t::set (called from…
CVE-2015-9274 — Medium (CVSS 6.5): HarfBuzz before 1.0.4 allows remote attackers to cause a denial of service (invalid read of two bytes and application…
CVE-2022-33068 — Medium (CVSS 5.5): An integer overflow in the component hb-ot-shape-fallback.cc of Harfbuzz v4.3.0 allows attackers to cause a Denial of…

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