High 7.3Known exploited (CISA KEV)Published Oct 6, 2021

CVE-2021-25487Lack 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…

Updated under an hour ago (Oct 27, 2026, 6:50 AM ET)

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It affects Samsung Mobile Devices and 1 other product. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Jun 29, 2023; federal agencies had to remediate by Jul 20, 2023. Treat that date as your deadline.

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Exploited in the last 30 days

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.

CVSS: 7.3 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Weakness (CWE): CWE-125
Known exploited: Added to CISA KEV Jun 29, 2023; federal remediation due Jul 20, 2023Apply updates per vendor instructions or discontinue use of the product if updates are unavailable
EPSS (exploitation in the next 30 days): 0.64% (percentile 50)
Assigned by: Samsung Mobile
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Samsung Mobile Samsung Mobile Devices samsung_mobile:devices (from the name)	from O(8.1), P(9.0), Q(10.0), R(11.0) before SMR Oct-2021 Release 1	CNA record
samsung android samsung:android	8.1; 9.0; 9.0; 9.0; 9.0; 9.0; 9.0; 9.0; and 20 more ranges	NVD

References

References

https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10	x-refsource-misc, vendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25487	us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.