libwebm: Out of bounds read in libwebm_util.cc:ParseVP9SuperFrameIndex() can lead to information leak or potential denial of service
Published Jan 30, 2018
8.8
HIGHCVSS 3.0
EPSS 2.00%
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
No data.
- ≤ 2018-01-30
No data.
Red Hat Enterprise Linux 6
chromium-browser
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | chromium-browser | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
AV:N/AC:M/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.00% (0.02000) | 80.00th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.04% (0.02038) | 78.53th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.25% (0.00253) | 65.58th | v3 (v2023.03.01) |
| May 10, 2024 | 0.25% (0.00253) | 65.00th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.24% (0.00238) | 61.41th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.20% (0.00201) | 57.36th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.18% (0.00184) | 54.55th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.29% (0.00285) | 63.74th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01037) | 27.58th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01037) | 0.00th | v1 |
References (6)
- https://access.redhat.com/security/cve/CVE-2018-6406 Vendor Advisory
- https://bugs.chromium.org/p/webm/issues/detail?id=1492 x_refsource_MISCPermissions Required
- https://bugzilla.redhat.com/show_bug.cgi?id=1547349 Issue Tracking
- https://github.com/dwfault/PoCs/blob/master/libwebm%20ParseVP9SuperFrameIndex%20memory%20corruption/libwebm%20ParseVP9SuperFrameIndex%20OOB%20read.md x_refsource_MISCBroken Link
- https://nvd.nist.gov/vuln/detail/CVE-2018-6406
- https://www.cve.org/CVERecord?id=CVE-2018-6406
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2018-6406 | Vendor Advisory | |
| https://bugs.chromium.org/p/webm/issues/detail?id=1492 | x_refsource_MISCPermissions Required | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1547349 | Issue Tracking | |
| https://github.com/dwfault/PoCs/blob/master/libwebm%20ParseVP9SuperFrameIndex%20memory%20corruption/libwebm%20ParseVP9SuperFrameIndex%20OOB%20read.md | x_refsource_MISCBroken Link | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-6406 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-6406 |
Change history (0)
No recorded changes yet.