FFmpeg up to 9.0.2 MOV Demuxer encryption_info.c av_encryption_init_info_free stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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3.7$0-$5k3.23-

Summaryinfo

A vulnerability was found in FFmpeg up to 9.0.2 and classified as problematic. This impacts the function av_encryption_init_info_free of the file libavutil/encryption_info.c of the component MOV Demuxer. Executing a manipulation can lead to stack-based overflow. This vulnerability appears as CVE-2026-107678. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic was found in FFmpeg up to 9.0.2. This vulnerability affects the function av_encryption_init_info_free of the file libavutil/encryption_info.c of the component MOV Demuxer. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect availability. CVE summarizes:

FFmpeg through 9.0.2 contains a stack exhaustion vulnerability in av_encryption_init_info_free() in libavutil/encryption_info.c, which recursively frees AVEncryptionInitInfo linked lists built by the MOV demuxer's mov_read_pssh(). Attackers can supply a crafted MP4 file with tens of thousands of small pssh boxes to exhaust the stack and crash the process, while also causing quadratic CPU consumption.

The advisory is shared for download at code.ffmpeg.org. This vulnerability was named CVE-2026-107678 since 10/08/2026. The exploitation appears to be easy. The attack needs to be approached locally. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.7

VulDB Base Score: 2.8
VulDB Temp Score: 2.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.7
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/08/2026 Advisory disclosed
10/08/2026 +0 days CVE reserved
10/08/2026 +0 days VulDB entry created
10/08/2026 +0 days VulDB entry last update

Sourcesinfo

Product: ffmpeg.org

Advisory: code.ffmpeg.org
Status: Not defined

CVE: CVE-2026-107678 (🔒)
GCVE (CVE): GCVE-0-2026-107678
GCVE (VulDB): GCVE-100-415468

Entryinfo

Created: 10/08/2026 17:44
Changes: 10/08/2026 17:44 (75)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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