A use-after-free issue was discovered in libwebm through 2018-02-02.
Priority MEDIUM 45CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
A use-after-free issue was discovered in libwebm through 2018-02-02. If a Vp9HeaderParser was initialized once before, its property frame_ would not be changed because of code in vp9parser::Vp9HeaderParser::SetFrame. Its frame_ could be freed while the corresponding pointer would not be updated, leading to a dangling pointer. This is related to the function OutputCluster in webm_info.cc.
Why it matters now
EPSS 0.01387 72nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:webmproject:libwebm:*:*:*:*:*:*:*:* | up to 1.0.0.27 | Vulnerable | Webmproject |
- cpe:2.3:a:webmproject:libwebm:*:*:*:*:*:*:*:* Versions up to 1.0.0.27 Vulnerable ·Webmproject
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-6548
- 2026-10-03 Alias added: GHSA-wfwr-mmpm-892c
References
More Webmproject Libwebm vulnerabilities
- TI-2018-04719 The function ParseVP9SuperFrameIndex in common/libwebm_util.cc in libwebm through… CVSS 3.0HIGH 8.8
- TI-2019-07138 In libwebm before 2019-03-08, a NULL pointer dereference caused by the functions… CVSS 3.0HIGH 7.5
- TI-2018-13634 In libwebm through 2018-10-03, there is an abort caused by… CVSS 3.0MEDIUM 6.5
Sources
- CVE-2018-6548 · CVE Program
- CVE-2018-6548 · NVD
- FIRST EPSS
- GHSA-wfwr-mmpm-892c · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences