CVE-2021-25487: Samsung Mobile Devices Out-of-Bounds Read Vulnerability

Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-c6baf1fd9287, updated 2026-11-02T23:39:54.475Z.

CISA Known Exploited Vulnerabilities

Name
Samsung Mobile Devices Out-of-Bounds Read Vulnerability
Vendor
Samsung
Product
Mobile Devices
Added to the catalog
2023-06-29
Due date for US federal agencies
2023-07-20
Weaknesses
CWE-125
Catalog version
2026.10.30

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.

Required action (CISA)

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

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status
Analyzed
Published
2021-10-06T18:15:09.567
Last modified
2026-06-17T03:42:10.500
Weaknesses
CWE-125

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.

MetricScoreSeverityVectorScored by
CVSS 3.17.3HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N[email protected] (Secondary)
CVSS 3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H[email protected] (Primary)
CVSS 2.04.6MEDIUMAV:L/AC:L/Au:N/C:P/I:P/A:P[email protected] (Primary)

References

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:41:59.479Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-25487

CVE record

Assigner
Samsung Mobile
State
PUBLISHED
Published
2021-10-06T17:10:26.000Z
Updated
2025-10-21T23:25:30.525Z
Problem types
CWE-125: Out-of-bounds Read

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.

References

Read on 2026-11-03T01:06:44.204Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2021/25xxx/CVE-2021-25487.json

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

CWE-125: Out-of-bounds Read

D3FEND ontology version 1.6.0.

Read on 2026-11-02T23:54:48.426Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-125.json

MITRE D3FEND™ knowledge graph. © 2025 The MITRE Corporation.
"The MITRE Corporation (MITRE) hereby grants you a non-exclusive, royalty-free license to use D3FEND for research, development, and commercial purposes. Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." Terms: https://d3fend.mitre.org/tou/

Sources and licences

  • CISA

    Source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30, CC0 1.0. Use of this data does not imply endorsement by CISA or DHS.

    CC0 1.0 Universal

  • National Vulnerability Database (NIST)

    This product uses the NVD API but is not endorsed or certified by the NVD.

    NVD API Terms of Use (NIST publications in the public domain, 17 U.S.C. 105)

  • CVE Program, The MITRE Corporation

    Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation. CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

    CVE Program Terms of Use ("CVE Usage" licence)

  • MITRE D3FEND

    MITRE D3FEND™ knowledge graph. © 2025 The MITRE Corporation.
    "The MITRE Corporation (MITRE) hereby grants you a non-exclusive, royalty-free license to use D3FEND for research, development, and commercial purposes. Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." Terms: https://d3fend.mitre.org/tou/

    MITRE D3FEND Terms of Use (site + knowledge graph); source repo MIT

Cite this page

Dragons Eye Ransomware Tracker, "CVE-2021-25487: Samsung Mobile Devices Out-of-Bounds Read Vulnerability",
entity page, dataset version ref-c6baf1fd9287, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2021-25487 (accessed 2026-11-03).
Underlying source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30.
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-06-17T03:42:10.500.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2025-10-21T23:25:30.525Z.
Underlying source: MITRE D3FEND, ontology version 1.6.0.

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