CVE-2026-21126: Input Validation

Q: What level of access would an attacker need?

Exploitation requires local attacker access to the affected device or environment.

Q: Which installations are affected?

Installations using libsimba.heifdec.media.samsung.so are affected if they are running a version prior to SMR Oct-2026 Release 1.

Q: What is the remediation?

Update to SMR Oct-2026 Release 1 or a later release that includes the fix.

Published Oct 12, 2026

Updated

Improper input validation in getting cover image in libsimba.heifdec.media.samsung.so prior to SMR Oct-2026 Release 1 allows local attackers to write out-of-bounds memory.

Affected Software

1 affected component

Samsung libsimba.heifdec.media.samsung.so<SMR Oct-2026 Release 1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Patch SMR Oct-2026 Release 1

Event History

Oct 12, 2026

CVE Published

via MITRE·04:57 AM

Data Sourced

via MITRE·04:57 AM

DescriptionWeakness

Frequently Asked Questions

What level of access would an attacker need?

Exploitation requires local attacker access to the affected device or environment.

Which installations are affected?

Installations using libsimba.heifdec.media.samsung.so are affected if they are running a version prior to SMR Oct-2026 Release 1.

What is the remediation?

Update to SMR Oct-2026 Release 1 or a later release that includes the fix.

CVE-2026-21126: Input Validation

Affected Software

Remediation

Event History

Frequently Asked Questions

What level of access would an attacker need?

Which installations are affected?

What is the remediation?

Company

Resources

Contact

Frequently Asked Questions

What level of access would an attacker need?

Which installations are affected?

What is the remediation?