CVE-2021-25489 on CISA KEV

Assuming radio permission is gained, missing input validation in modem interface driver prior to SMR Oct-2021 Release 1 results in format string bug leading to kernel panic.

01What CISA says about this vulnerability

Assuming radio permission is gained, missing input validation in modem interface driver prior to SMR Oct-2021 Release 1 results in format string bug leading to kernel panic.

02Required action — verbatim from CISA

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

03Notes & references

• security.samsungmobile.com — https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
Samsung Mobile	Samsung Mobile Devices	O(8.1), P(9.0), Q(10.0), R(11.0)

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

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