FFmpeg up to 9.0.2 Huffyuv decoder decode_slice temp uninitialized resource

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k2.18+

Summaryinfo

A vulnerability, which was classified as problematic, has been found in FFmpeg up to 9.0.2. Affected by this vulnerability is the function decode_slice of the component Huffyuv decoder. The manipulation of the argument Temp leads to uninitialized resource. This vulnerability is referenced as CVE-2026-120247. The attack can only be performed from a local environment. No exploit is available.

Detailsinfo

A vulnerability was found in FFmpeg up to 9.0.2. It has been rated as problematic. This issue affects the function decode_slice of the component Huffyuv decoder. The manipulation of the argument temp with an unknown input leads to a uninitialized resource vulnerability. Using CWE to declare the problem leads to CWE-908. The product uses or accesses a resource that has not been initialized. Impacted is confidentiality. The summary by CVE is:

FFmpeg 2.3 through 9.0.2 contains a use of uninitialized resource vulnerability in the Huffyuv decoder that allows attackers to leak heap memory into decoded pixels via short packed-BGR bitstreams. Attackers can craft a Huffyuv BGR24/BGRA video whose entropy data ends early, causing decode_slice() to add uninitialized s->temp[0] bytes into output frames, exposing heap contents.

The advisory is shared at code.ffmpeg.org. The identification of this vulnerability is CVE-2026-120247 since 10/31/2026. The exploitation is known to be easy. An attack has to be approached locally. It demands that the victim is doing some kind of user interaction. Technical details are known, 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.

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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: 4.1
VulDB Meta Temp Score: 4.1

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

CNA Base Score: 5.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

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

Exploitinginfo

Class: Uninitialized resource
CWE: CWE-908
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

10/31/2026 CVE reserved
11/01/2026 +1 days Advisory disclosed
11/01/2026 +0 days VulDB entry created
11/01/2026 +0 days VulDB entry last update

Sourcesinfo

Product: ffmpeg.org

Advisory: code.ffmpeg.org
Status: Not defined

CNA: VulnCheck
CVE: CVE-2026-120247 (🔒)

GCVE (CVE): GCVE-0-2026-120247
GCVE (VulDB): GCVE-100-429605

Entryinfo

Created: 11/01/2026 02:09
Changes: 11/01/2026 02:09 (75)
Complete: 🔍
Cache ID: 216::103

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