A vulnerability was found in FLVMeta up to 1.2.2. (CVE-2026-82820)
Description
A heap-based buffer overflow vulnerability exists in the amf_string_new function of FLVMeta up to version 1.2.2. The issue arises from improper manipulation of the argument length, which can be triggered remotely. Although an exploit has been publicly disclosed, the project maintainer questions the practical exploitability of this vulnerability. A patch addressing this issue is available.
CVSS v3.1
Score 4.3medium
Affected software
pkg:deb/ubuntu/flvmeta?arch=source&distro=xenialpkg:deb/ubuntu/flvmeta?arch=source&distro=bionicpkg:deb/ubuntu/flvmeta?arch=source&distro=focalpkg:deb/ubuntu/flvmeta?arch=source&distro=jammypkg:deb/ubuntu/flvmeta?arch=source&distro=noblepkg:deb/ubuntu/flvmeta?arch=source&distro=stonkingpkg:deb/ubuntu/flvmeta?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-82820 identifies a heap-based buffer overflow in the amf_string_new function within the src/amf.c component of FLVMeta versions up to 1.2.2. The vulnerability is due to improper handling of the length argument, potentially allowing remote attackers to cause a buffer overflow. While exploit code has been made public, the maintainer has expressed skepticism regarding the feasibility of exploitation. A patch identified by commit f412a33b9a84c2d1a9dee145a868feddbf64879e has been released to fix this issue.
Potential Impact
The vulnerability can cause a denial of service by crashing the application due to a heap-based buffer overflow. There is no confirmed impact on confidentiality or integrity. The exploit is remotely triggerable but no confirmed in-the-wild exploitation is reported. The CVSS score is 4.3 (medium), reflecting the limited impact primarily to availability.
Mitigation Recommendations
A patch is available and should be applied to remediate this vulnerability. Users should update FLVMeta to a version that includes the fix identified by commit f412a33b9a84c2d1a9dee145a868feddbf64879e. The project maintainer has not confirmed practical exploitability, but applying the official fix is recommended.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-82820
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad3f55e2cdf04f656661822
Added to database: 10/17/2026, 22:23:26 UTC
Last enriched: 10/17/2026, 23:31:01 UTC
Last updated: 10/17/2026, 23:31:01 UTC
Views: 3
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