CVE-2026-82820: FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow
A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amfstringnew of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: "While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities."
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
FLVMeta AMF String Processing (src/amf.c, amf_string_new)to a version that resolves this vulnerability.Fixed in 1.2.2Patch f412a33b9a84c2d1a9dee145a868feddbf64879e
Event History
Frequently Asked Questions
Which deployments should be prioritized for assessment?
FLVMeta versions up to 1.2.2 are identified as affected. Systems that process AMF strings and can be reached remotely should be prioritized, particularly because a public exploit is reported.
Does exploitation require prior authentication or user involvement?
The reported vector is remote and does not require privileges. The supplied severity vector indicates user interaction is required.
How can I verify whether a fix has been applied?
Confirm that the deployed FLVMeta version is no longer within the affected range or that patch f412a33b9a84c2d1a9dee145a868feddbf64879e has been applied. No alternative mitigation is provided in the available information.