CVE-2015-8790

The EbmlUnicodeString::UpdateFromUTF8 function in libEBML before 1.3.3 allows context-dependent...

4.3 MediumFix available

The EbmlUnicodeString::UpdateFromUTF8 function in libEBML before 1.3.3 allows context-dependent attackers to obtain sensitive information from process heap memory via a crafted UTF-8 string, which triggers an invalid memory access.

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: Low
Integrity: None
Availability: None

Exploit likelihood

1.85%Up 0.7 points since Feb 4, 2022

What each source reports

NVD Score used 4.3

Record: CVE-2015-8790
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:P/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

CVE List No score

Record: CVE-2015-8790
Updated: 2026-11-02

EUVDEUVD-2015-8662 No score

Record: EUVD-2015-8662
Updated: 2026-11-03

GitHub AdvisoriesGHSA-jhvm-j3gg-ph57 4.3

The EbmlUnicodeString::UpdateFromUTF8 function in libEBML before 1.3.3 allows context-dependent...

Record: GHSA-jhvm-j3gg-ph57
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSV 4.3

Record: CVE-2015-8790
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2015-8790 4.3

Record: DEBIAN-CVE-2015-8790
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2015-8790 4.3

Record: UBUNTU-CVE-2015-8790
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Updated: 2026-11-02

Affected products

matroska libebml

Affected packages

Affected packages
Package	Affected	Fixed
`libebml` Debian:12	before 1.3.3-1	1.3.3-1
`libebml` Debian:13	before 1.3.3-1	1.3.3-1
`libebml` Debian:14	before 1.3.3-1	1.3.3-1
`libebml` Debian:6.0	before 0.7.7-3.1+deb6u1, plus listed versions 0.7.7-3.1	0.7.7-3.1+deb6u1
`libebml` Debian:7	before 1.2.2-2+deb7u1, plus listed versions 1.2.2-2	1.2.2-2+deb7u1
`libebml` Debian:8	before 1.3.0-2+deb8u1, plus listed versions 1.3.0-2	1.3.0-2+deb8u1
`libebml` Ubuntu:14.04:LTS	before 1.3.0-2+deb8u1build0.14.04.1, plus listed versions 1.2.2-21.3.0-2	1.3.0-2+deb8u1build0.14.04.1

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-2015-8790 is a medium vulnerability (CVSS 4.3) in Matroska Libebml, published January 29, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.85%, the 79th percentile. Fixed in libebml 1.3.3-1.

References

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