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CVE-2021-25489 is a vulnerability in the modem interface driver of multiple Samsung mobile device models prior to the SMR Oct-2021 Release 1. The vulnerability arises from missing input validation, which results in a format string bug. Exploitation requires that the attacker has already gained radio permission. If exploited, the bug can trigger a kernel panic, leading to a denial of service condition on the affected device.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
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No public activity tracked yet. Mallory keeps watching.
No public activity observed for this vulnerability.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
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