CVE-2015-8789: Use-after-free vulnerability in the EbmlMaster::Read function in libEBML before 1.3.3 allows context-depend...

Security readout for executives and security teams

CVE-2015-8789 is a memory-safety flaw in libEBML before 1.3.3. A crafted EBML document could trigger a use-after-free when parsed. The public record does not specify the final impact, so business urgency depends on whether systems accept or process untrusted EBML or Matroska-style media files. Exposure is most likely in software, services, or appliances that embed libEBML before 1.3.3 and parse EBML documents from users, partners, uploads, or automated media pipelines. Treat this as dependency hygiene with elevated attention for media-processing systems exposed to untrusted files. The lack of impact detail prevents a confident severity call, but memory-safety parser flaws can matter in exposed ingestion paths. Mitigation focus: Update libEBML to 1.3.3 or a vendor-fixed package.; Review Debian, openSUSE, and upstream Matroska guidance for applicable package fixes.; Restrict untrusted EBML or Matroska parsing where updates cannot be applied promptly..

Prepared

Jun 13, 2026, 21:06 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.