Process crash via unchecked AMF node traversal
Published Aug 31, 2026 · Updated Aug 31, 2026
Null pointer dereference in FLVMeta 1.2.0 through 1.2.2 allows context-dependent attackers to crash the utility via a malformed FLV file. The amf_object_get function advances through an AMF object using node->next->next and dereferences a missing data node before checking it for NULL. Processing an attacker-supplied file is required, and the demonstrated consequence is a process crash; the maintainer disputes security impact.
Summary
What happened
Null pointer dereference in FLVMeta 1.2.0 through 1.2.2 allows context-dependent attackers to crash the utility via a malformed FLV file. The amf_object_get function advances through an AMF object using node->next->next and dereferences a missing data node before checking it for NULL. Processing an attacker-supplied file is required, and the demonstrated consequence is a process crash; the maintainer disputes security impact.
The record
- CVE
- CVE-2026-82821
- Published
- Aug 31, 2026
- Updated
- Aug 31, 2026
- Vendor
- Marc Noirot
- Product
- FLVMeta
- Classifications
- CWE-404, CWE-476, T1204.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 31, 2026CVE publishedPublication date reported by the CVE source.
- Aug 31, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.2.0
- Affected versionversion=1.2.1
- Affected versionversion=1.2.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- flvmeta_SEGV malformed FLV proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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