Samsung Mobile Devices Improper Input Validation Vulnerability

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

• cpe samsung/android8.1
• cpe samsung/android9.0
• vendor Samsung Mobile Devicesversion unspecified

How to fix CVE-2021-25489

• Recommended remediation

  Apply updates per vendor instructions or discontinue use of the product if updates are unavailable CISA due date Jul 20, 2023.

• Official advisories

  • CISA KEV · cisa.gov
  • CVE.org · cve.org
  • FIRST EPSS · first.org
  • NIST NVD · nvd.nist.gov
  • VulnCheck KEV · vulncheck.com

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Oct 6, 2021 · Catalog

   Detected

   Assuming radio permission is gained, missing input validation in modem interface driver prior to SMR Oct-2021 Release 1 results in format string bug leading to kernel panic.

2. Jun 29, 2023 · CISA KEV

   Known exploited

   Apply updates per vendor instructions or discontinue use of the product if updates are unavailable

3. Jul 20, 2023 · CISA KEV

   Remediation due

   Apply updates per vendor instructions or discontinue use of the product if updates are unavailable

4. Jun 16, 2026 · Catalog

   Updated

   Assuming radio permission is gained, missing input validation in modem interface driver prior to SMR Oct-2021 Release 1 results in format string bug leading to kernel panic.

Sources

• CISA KEVConfirmed exploitationCVE-2021-25489

  Samsung mobile devices contain an improper input validation vulnerability within the modem interface driver that results in a format string bug leading to kernel panic.

  cisa.gov
• CVE.orgVulnerability recordCVE-2021-25489

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2021-25489

  30-day exploitation probability 0.5%

  first.org
• NIST NVDVulnerability recordCVE-2021-25489

  Assuming radio permission is gained, missing input validation in modem interface driver prior to SMR Oct-2021 Release 1 results in format string bug leading to kernel panic.

  nvd.nist.gov
• VulnCheck KEVConfirmed exploitationCVE-2021-25489

  Samsung mobile devices contain an improper input validation vulnerability within the modem interface driver that results in a format string bug leading to kernel panic.

  vulncheck.com

References

• VulnCheck exploitation evidence · docs.google.com
• CISA note · nvd.nist.gov
• CISA note · security.samsungmobile.com
• US Government Resource · cisa.gov
• VulnCheck exploitation evidence · cisa.gov

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.