Samsung Mobile Devices Out-of-Bounds Read Vulnerability

Are you affected?

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

How to fix CVE-2021-25487

• 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

   Samsung mobile devices contain an out-of-bounds read vulnerability within the modem interface driver due to a lack of boundary checking of a buffer in set_skb_priv(), leading to remote code execution by dereference of an invalid function pointer.

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

   Samsung mobile devices contain an out-of-bounds read vulnerability within the modem interface driver due to a lack of boundary checking of a buffer in set_skb_priv(), leading to remote code execution by dereference of an invalid function pointer.

Sources

• CISA KEVConfirmed exploitationCVE-2021-25487

  Samsung mobile devices contain an out-of-bounds read vulnerability within the modem interface driver due to a lack of boundary checking of a buffer in set_skb_priv(), leading to remote code execution by dereference of an invalid function pointer.

  cisa.gov
• CVE.orgVulnerability recordCVE-2021-25487

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2021-25487

  30-day exploitation probability 0.6%

  first.org
• NIST NVDVulnerability recordCVE-2021-25487

  Lack of boundary checking of a buffer in set_skb_priv() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read and it results in arbitrary code execution by dereference of invalid function pointer.

  nvd.nist.gov
• VulnCheck KEVConfirmed exploitationCVE-2021-25487

  Samsung mobile devices contain an out-of-bounds read vulnerability within the modem interface driver due to a lack of boundary checking of a buffer in set_skb_priv(), leading to remote code execution by dereference of an invalid function pointer.

  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.