Description
Use-after-free vulnerability in the EbmlMaster::Read function in libEBML before 1.3.3 allows context-dependent attackers to have unspecified impact via a "deeply nested element with infinite size" followed by another element of an upper level in an EBML document.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libebml | 1.3.3-1 | — |
| Debian 13 | libebml | 1.3.3-1 | — |
| Debian 12 | libebml | 1.3.3-1 | — |
| Debian 8 | libebml | 1.3.0-2+deb8u1 | DSA-3538-1 |
| Debian 7 | libebml | 1.2.2-2+deb7u1 | DSA-3538-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | libebml | 1.3.0-2+deb8u1build0.14.04.1 | — |
Advisories 1
- DSA-3538-1 libebml - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-3538 vendor-advisory
- 94924 vdb-entry
- openSUSE-SU-2016:0125 vendor-advisory
- https://github.com/Matroska-Org/libebml/commit/88409e2a94dd3b40ff81d08bf6d92f486d036b24
- [matroska-users] 20151020 libEBML v1.3.3, libMatroska v1.4.4 released: important fixes mailing-list
- https://github.com/Matroska-Org/libebml/blob/release-1.3.3/ChangeLog
- http://www.talosintelligence.com/reports/TALOS-2016-0037/