CVE-2021-25487
Samsung Mobile Devices Out-of-Bounds Read Vulnerability
What the flaw is
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.
Description as published by CISA. We have not independently reproduced it.
What CISA requires
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable
This deadline is binding on US federal civilian agencies under BOD 22-01. It is not a legal deadline for anyone else, but it is a useful urgency signal — CISA sets it by how actively the flaw is being used, not by CVSS.
Public exploit code
2 public repositories referencing this CVE have been catalogued on GitHub. Treat this as a strong signal to prioritise patching, not as a verified working exploit — many such repositories are scanners, write-ups or forks rather than functional code.
Vendor advisories
Primary sources
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Other Samsung entries
See allSource: CISA KEV catalog · last verified July 31, 2026. Rebuilt automatically twice a day.