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CVE-2021-3497GStreamer before 1.18.4 might access already-freed memory in error code paths when demuxing certain malformed Matroska files.
- 7.8HighCVSS base score
- 1.2%Exploitation in 30 daysEPSS · top 31% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
GStreamer before 1.18.4 might access already-freed memory in error code paths when demuxing certain malformed Matroska files.
Timeline
ID reserved
By redhat
- 6 days later
· 6 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.2% · top 31% of all CVEs (13 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
gstreamer-plugins-good
- affected gstreamer-plugins-good 1.18.4
References
References5
- https://bugzilla.redhat.com/show_bug.cgi?id=1945339 (opens in a new tab)x_refsource_MISCx_transferred
- https://gstreamer.freedesktop.org/security/sa-2021-0002.html (opens in a new tab)x_refsource_MISCx_transferred
- DSA-4900 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- [debian-lts-announce] 20210426 [SECURITY] [DLA 2640-1] gst-plugins-good1.0 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- GLSA-202208-31 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_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)
- EUVD EUVD-2021-26818 (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://cveledger.app/cve/CVE-2021-3497)Record last updated .