What’s Vulnerable › Vulnerabilities

CVE-2018-6406

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-01-30 · updated 2026-06-17
• Weakness: CWE-125

Description

The function ParseVP9SuperFrameIndex in common/libwebm_util.cc in libwebm through 2018-01-30 does not validate the child_frame_length data obtained from a .webm file, which allows remote attackers to cause an information leak or a denial of service (heap-based buffer over-read and later out-of-bounds write), or possibly have unspecified other impact.

Affected products

• Webmproject Libwebm: through 2018-01-30

References

• https://bugs.chromium.org/p/webm/issues/detail?id=1492
• https://github.com/dwfault/PoCs/blob/master/libwebm%20ParseVP9SuperFrameIndex%20memory%20corruption/libwebm%20ParseVP9SuperFrameIndex%20OOB%20read.md
• https://bugs.chromium.org/p/webm/issues/detail?id=1492
• https://github.com/dwfault/PoCs/blob/master/libwebm%20ParseVP9SuperFrameIndex%20memory%20corruption/libwebm%20ParseVP9SuperFrameIndex%20OOB%20read.md

Get alerted when CVE-2018-6406 or the next vulnerability affects your stack