CVE-2020-6617

stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_int.

8.8 High

CVE-2020-6617 is a high vulnerability (CVSS 8.8) in Nothings Stb Truetype.h, published January 8, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.14%, the 66th percentile. No source names a fixed version.

stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_int.

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: High
Integrity: High
Availability: High

Exploit likelihood

1.14%Up 0.7 points since Apr 14, 2021

What each source reports

NVD Score used 8.8

stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_int.

Record: CVE-2020-6617
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-617
Updated: 2026-11-02

CVE List No score

stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_int.

Record: CVE-2020-6617
Updated: 2026-11-02

EUVDEUVD-2020-27765 No score

stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_int.

Record: EUVD-2020-27765
Updated: 2026-11-03

GitHub AdvisoriesGHSA-68cv-h8f5-g7hw No score

stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_int.

stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_int.

Record: GHSA-68cv-h8f5-g7hw
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-6617 8.8

stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_int.

Record: UBUNTU-CVE-2020-6617
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

nothings stb truetype.h

Affected packages

Affected packages
Package	Affected	Fixed
`libstb` Ubuntu:20.04:LTS	All versions, plus listed versions 0.0~git20190817.1.052dce1-1	None known
`libstb` Ubuntu:22.04:LTS	All versions, plus listed versions 0.0~git20200713.b42009b+ds-10.0~git20210910.af1a5bc+ds-1	None known
`libstb` Ubuntu:24.04:LTS	All versions, plus listed versions 0.0~git20230129.5736b15+ds-10.0~git20230129.5736b15+ds-1.10.0~git20230129.5736b15+ds-1.2	None known
`libstb` Ubuntu:25.10	All versions, plus listed versions 0.0~git20240715.f7f20f39fe4f+ds-10.0~git20241109.5c20573+ds-1	None known
`libstb` Ubuntu:26.10	All versions, plus listed versions 0.0~git20250907.fede005+ds-1	None known
`libstb` Ubuntu:26.04:LTS	All versions, plus listed versions 0.0~git20241109.5c20573+ds-10.0~git20250907.fede005+ds-1	None known

History

History
When	Changed	Sources
2026-11-03	aliases	EUVD
2026-11-02	created	CVE List, GitHub Advisories, NVD, OSV

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Affected packages

History

References