CVE-2015-9274

HarfBuzz before 1.0.4 allows remote attackers to cause a denial of service (invalid read of two...

6.5 MediumFix available

HarfBuzz before 1.0.4 allows remote attackers to cause a denial of service (invalid read of two bytes and application crash) because of GPOS and GSUB table mishandling, related to hb-ot-layout-gpos-table.hh, hb-ot-layout-gsub-table.hh, and hb-ot-layout-gsubgpos-private.hh.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.55%Up 0.5 points since Feb 4, 2022

What each source reports

NVD Score used 6.5

Record: CVE-2015-9274
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-125
Updated: 2026-11-02

CVE List No score

Record: CVE-2015-9274
Updated: 2026-11-02

EUVDEUVD-2015-9116 No score

Record: EUVD-2015-9116
Updated: 2026-11-03

GitHub AdvisoriesGHSA-95rc-6f28-2jcq 6.5

HarfBuzz before 1.0.4 allows remote attackers to cause a denial of service (invalid read of two...

Record: GHSA-95rc-6f28-2jcq
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-125
Updated: 2026-11-02

OSV 6.5

Record: CVE-2015-9274
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2015-9274 6.5

Record: DEBIAN-CVE-2015-9274
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2015-9274 6.5

Record: UBUNTU-CVE-2015-9274
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUSN-5746-1 No score

harfbuzz vulnerability

Behzad Najjarpour Jabbari discovered that HarfBuzz incorrectly handled certain inputs. A remote attacker could possibly use this issue to cause a denial of service.

Record: USN-5746-1
Updated: 2026-11-02

Affected products

harfbuzz project harfbuzz

Affected packages

Affected packages
Package	Affected	Fixed
`harfbuzz` Debian:12	before 1.2.6-1	1.2.6-1
`harfbuzz` Debian:13	before 1.2.6-1	1.2.6-1
`harfbuzz` Debian:14	before 1.2.6-1	1.2.6-1
`harfbuzz` Ubuntu:Pro:16.04:LTS	before 1.0.1-1ubuntu0.1+esm1, plus listed versions 1.0.1-1build21.0.1-1ubuntu0.1	1.0.1-1ubuntu0.1+esm1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2015-9274 is a medium vulnerability (CVSS 6.5) in Harfbuzz Project Harfbuzz, published November 15, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.55%, the 75th percentile. Fixed in harfbuzz 1.2.6-1.