Back
CVE-2017-5396
A use-after-free vulnerability in the Media Decoder when working with media files when some events are fired after the media elements are…
Critical9.8EPSS 4.0%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
A use-after-free vulnerability in the Media Decoder when working with media files when some events are fired after the media elements are freed from memory. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 4.0% · top 9.4% of all CVEs (3 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
- Use-after-free with Media Decoder
- CWE-416 (opens in a new tab)Other CVEs with CWE-416
Affected products
Mozilla · Thunderbird
- affected unspecified – < 45.7
Mozilla · Firefox ESR
- affected unspecified – < 45.7
Mozilla · Firefox
- affected unspecified – < 51
References (12)
- https://www.mozilla.org/security/advisories/mfsa2017-03/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.mozilla.org/security/advisories/mfsa2017-02/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- GLSA-201702-22 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- DSA-3832 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- GLSA-201702-13 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- DSA-3771 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 1037693 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://www.mozilla.org/security/advisories/mfsa2017-01/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2017:0190 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1329403 (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2017:0238 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 95769 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2017-5396)Record last updated .