ZDI-26-169: GStreamer H.266 Codec Parser Integer Underflow Remote Code Execution Vulnerability
This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-3084.
AI Analysis
Technical Summary
CVE-2026-3084 is an integer underflow vulnerability in the GStreamer H.266 codec parser. The vulnerability occurs due to insufficient validation of user-supplied data when parsing picture partitions, which can cause an integer underflow before memory writes. This flaw enables remote attackers to execute arbitrary code within the context of the affected process. Exploitation requires the target to process crafted media data via GStreamer. The Zero Day Initiative assigned a CVSS score of 7.8 and classified the severity as critical. GStreamer has released a patch to fix this issue.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary code with the privileges of the process using the vulnerable GStreamer library. This can lead to full compromise of the affected system or application. The vulnerability affects all installations of GStreamer that process H.266 codec data without the patch.
Mitigation Recommendations
GStreamer has issued an official update that corrects this vulnerability. Users and administrators should apply the update from the official GStreamer repository or package maintainers to remediate the issue. No additional mitigation steps are indicated beyond applying the patch.
ZDI-26-169: GStreamer H.266 Codec Parser Integer Underflow Remote Code Execution Vulnerability
Description
This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-3084.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-3084 is an integer underflow vulnerability in the GStreamer H.266 codec parser. The vulnerability occurs due to insufficient validation of user-supplied data when parsing picture partitions, which can cause an integer underflow before memory writes. This flaw enables remote attackers to execute arbitrary code within the context of the affected process. Exploitation requires the target to process crafted media data via GStreamer. The Zero Day Initiative assigned a CVSS score of 7.8 and classified the severity as critical. GStreamer has released a patch to fix this issue.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary code with the privileges of the process using the vulnerable GStreamer library. This can lead to full compromise of the affected system or application. The vulnerability affects all installations of GStreamer that process H.266 codec data without the patch.
Mitigation Recommendations
GStreamer has issued an official update that corrects this vulnerability. Users and administrators should apply the update from the official GStreamer repository or package maintainers to remediate the issue. No additional mitigation steps are indicated beyond applying the patch.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-169/","fetched":true,"fetchedAt":"2026-05-26T20:01:55.923Z","wordCount":201}
Threat ID: 6a15fc94e29bf47b5055e516
Added to database: 5/26/2026, 8:03:32 PM
Last enriched: 5/26/2026, 8:26:01 PM
Last updated: 5/27/2026, 4:55:08 AM
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.