Samsung Devices libsmkvextractor.so out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k1.26

Summaryinfo

A vulnerability classified as very critical has been found in Samsung Devices. The affected element is an unknown function of the file libsmkvextractor.so. The manipulation leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2026-21116. Local access is required to approach this attack. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Samsung Devices (version now known). It has been rated as very critical. This issue affects some unknown processing of the file libsmkvextractor.so. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Out-of-bounds write in libsmkvextractor.so prior to SMR Oct-2026 Release 1 allows local attackers to write out-of-bounds memory.

It is possible to read the advisory at security.samsungmobile.com. The identification of this vulnerability is CVE-2026-21116 since 12/11/2025. The exploitation is known to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/12/2026).

Applying the patch SMR Oct-2026 Release is able to eliminate this problem.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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License

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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: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

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

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: SMR Oct-2026 Release

Timelineinfo

12/11/2025 CVE reserved
10/12/2026 +304 days Advisory disclosed
10/12/2026 +0 days VulDB entry created
10/12/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: samsung.com

Advisory: security.samsungmobile.com
Status: Confirmed

CVE: CVE-2026-21116 (🔒)
GCVE (CVE): GCVE-0-2026-21116
GCVE (VulDB): GCVE-100-416807

Entryinfo

Created: 10/12/2026 07:22
Changes: 10/12/2026 07:22 (65)
Complete: 🔍
Cache ID: 216::103

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