Description
A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new 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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | FLVMeta | 1.2.0, 1.2.1, 1.2.2 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | flvmeta | No fix yet | — |
| Debian 13 | flvmeta | No fix yet | — |
| Debian 12 | flvmeta | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | flvmeta | No fix yet | — |
| Ubuntu 26.04 LTS | flvmeta | No fix yet | — |
| Ubuntu 24.04 LTS | flvmeta | No fix yet | — |
| Ubuntu 22.04 LTS | flvmeta | No fix yet | — |
| Ubuntu 20.04 LTS | flvmeta | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | flvmeta | No fix yet | — |
| Ubuntu 16.04 LTS | flvmeta | No fix yet | — |
References
- VDB-397243 | FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow vdb-entry technical-description
- VDB-397243 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- CVE-2026-82820 | CVE Analysis and Report third-party-advisory
- Submit #876596 | flvmeta 1.2.2 Heap-based Buffer Overflow third-party-advisory
- https://github.com/noirotm/flvmeta/issues/27 issue-tracking
- https://github.com/raind20001020/Poc/blob/main/flvmeta_heap_buffer_overflow exploit
- https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e patch