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

criticalknown exploitedCVE-2021-25487
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Samsungproduct: Samsung Mobile DevicesRemote code execution
What
An out-of-bounds read vulnerability within the modem interface driver can lead to remote code execution.
Who is affected
Users of affected Samsung mobile devices.
Urgency
Immediate action is required due to the critical severity and confirmed exploitation.
Action
Update to the latest firmware from Samsung.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2023-06-29
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-25487

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2021-25487coverage & exploitation statusNVD · CVE.org

Recent advisories for Samsung Mobile Devices

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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