The decrease_ref_count function in libvpx in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via malformed WebM video data.
Exploitability
AV:NAC:LAu:NImpact
C:CI:CA:C10/AV:N/AC:L/Au:N/C:C/I:C/A:C