Samsung Devices up to SMR Mar-2021 Release 1 Subtitle Frame libsubextractor.so input validation

Summaryinfo

A vulnerability was found in Samsung Devices. It has been rated as problematic. This vulnerability affects unknown code of the file libsubextractor.so of the component Subtitle Frame. This manipulation causes input validation. The identification of this vulnerability is CVE-2026-21088. The attack can only be executed locally. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Samsung Devices. It has been declared as problematic. Affected by this vulnerability is an unknown function of the file libsubextractor.so of the component Subtitle Frame. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Improper input validation in loading a subtitle frame in libsubextractor.so prior to SMR Sep-2026 Release 1 allows local attackers to write out-of-bounds memory.

The advisory is shared at security.samsungmobile.com. This vulnerability is known as CVE-2026-21088 since 12/11/2025. The exploitation appears to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available.

Upgrading to version SMR Sep-2026 Release 1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-3219). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Samsung Android

Productinfo

Vendor

• Samsung

Name

• Devices

Version

• 1
• 4.1.01.0
• 7
• 8
• 9.0
• 10.0
• 11.0
• 2017-11-03
• 2020-04-02
• 2026
• Go(8.1)
• Go(9.0)
• L
• L(5.1)
• L(5.x)
• M
• M(6.0)
• M(6.x)
• N
• N(7.0)
• N(7.1)
• N(7.x)
• O(8.0)
• O(8.1)
• O(8.X)
• O(8.x)
• P(9.0)
• P(9.x)
• Q(10.0)
• Q(10.x)
• R(11.0)
• SMR Aug-2026 Release
• SMR Aug-2026 Release 1
• SMR Feb-2021 Release 1
• SMR Jul-2024 Release
• SMR Jul-2024 Release 1
• SMR Jul-2026 Release
• SMR Mar-2021 Release 1

License

• commercial

Website

• Vendor: https://www.samsung.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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