CVE-2021-25487
KEVSamsung Mobile Devices Out-of-Bounds Read Vulnerability
Description
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.
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 3.1 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:NPublishedOct 6, 2021
Last modifiedJun 17, 2026
Added to KEVJun 29, 2023
Remediation dueJul 20, 2023
References
- security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10Vendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25487US Government Resource
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Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1196 days
- CVSS
- 7.3 HIGH
- EPSS (30-day exploit probability)
- 0.64% · top 50% of all CVEs
- Weakness
- CWE-125
Recommended actions
- 1.Apply updates per vendor instructions or discontinue use of the product if updates are unavailable
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.