Unrated

Heap Buffer Overflow in FFmpeg img2enc.c

IdentifiersCVE-2026-39216CWE-122

CVE-2026-39216 is reported as a heap buffer overflow in FFmpeg's img2enc.c, introduced in 2012. The provided content identifies the affected component and vulnerability class but does not include the specific vulnerable function, trigger condition, affected versions, or patch details. Based on the available information, this is a memory corruption flaw in FFmpeg's image-to-encoder path that can result from processing attacker-controlled media-related input reaching img2enc.c.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can cause heap memory corruption in FFmpeg. Depending on allocator state, memory layout, and reachability from attacker-controlled input, the impact may include process crash/denial of service and potentially code execution. The provided content does not supply a validated exploit path or confirmed impact beyond heap buffer overflow for this specific CVE.

Mitigation

If you can’t patch tonight, do this now.

Until patched builds are deployed, reduce exposure by limiting or disabling workflows that process untrusted media inputs through affected FFmpeg functionality, especially any network-facing or automated transcoding/encoding pipelines that may reach img2enc.c. Run FFmpeg-based services with least privilege, sandboxing, and process isolation to reduce the impact of memory corruption. Monitor for crashes or anomalous behavior in media-processing services.

Remediation

Patch, then assume compromise.

Apply the upstream FFmpeg fix for CVE-2026-39216 or the corresponding vendor/distribution security update that includes the patch. Because the content states this issue has been fixed, defenders should update to a build containing the remediation and verify that all statically bundled or embedded FFmpeg copies in dependent products are also updated.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

2 SOURCESView more in app

cyber security newsNews

Jun 9, 2026

21 0-Day Vulnerabilities in FFmpeg Enables Remote Code Execution Attacks

Heap buffer overflow vulnerability in FFmpeg img2enc.c.

the hacker newsNews

Jun 6, 2026

AI Agent Uncovers 21 Zero-Days in FFmpeg; Chrome Patches Record 429 Bugs

One of nine FFmpeg vulnerabilities identified by an autonomous AI agent; the FFmpeg findings are described as mostly heap or stack overflows in parsers and demuxers.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2026-39216

NVD

nvd.nist.gov/vuln/detail/CVE-2026-39216

MITRE CWE · CWE-122

cwe.mitre.org