CVE-2024-56732: harfbuzz_project harfbuzz Heap-based Buffer Overflow
CVSS: 9.3v4.0CriticalAnalyzed
AliasesUBUNTU-CVE-2024-56732DEBIAN-CVE-2024-56732openSUSE-SU-2025:14614-1
Published 27-12-2024Last modified 28-12-2024
Vulnerability summary
CVE-2024-56732 is a critical (CVSS 9.3) Heap-based Buffer Overflow vulnerability in harfbuzz_project harfbuzz. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50.2% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.3/10
010
Critical · v4.0 (CVE.org)EPSS score
0.65%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 0 · Related 1Timeline
- 27-12-2024PublishedVulnerability first disclosed.
- 28-12-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
7 scores · 4 sources · 2 versionsCritical 9.3Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated9.3CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- OSV · DebianEcosystem advisory · calculated9.3CriticalCVSS: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
- NVDNIST9.3CriticalCVSS: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
High 8.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.65%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
0.00 pp
From 0.66% on 18-09-2026
18-09-202618-10-2026
EPSS score0.65%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundHarfbuzz
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Debian1 product
- harfbuzz< 10.1.0-2
Harfbuzz1 product
- harfbuzz≥ 8.5.0, ≤ 10.0.1
Harfbuzz_project1 product
- harfbuzz≥ 8.5.0, ≤ 10.0.1
Opensuse1 product
- harfbuzz&distro=openSUSE Tumbleweed< 10.1.0-2.1
Ubuntu1 product
- harfbuzzAll versions (No fix recorded) | < 10.2.0-1
5 vendors · 5 products
References
8 links- github.com/harfbuzz/harfbuzz/security/advisories/GHSA-qmp9-xqm5-jh6mX Refsource CONFIRMREPORTExploitVendor Advisory
