CVE-2015-4486
Mozilla: Buffer overflows on Libvpx when decoding WebM video (MFSA 2015-89)
Severity
CriticalRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · August 11, 2015
Updated · November 21, 2025
Description
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.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 6.8AV:N/AC:M/Au:N/C:P/I:P/A:P
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer