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CVE-2025-21483 is a critical memory corruption vulnerability in Qualcomm Data Network Stack and Connectivity components. The flaw is triggered when a user equipment device receives a crafted RTP packet from the network during reassembly of Network Abstraction Layer Units used by video streaming codecs such as H.264, H.265, and H.266. Available reporting indicates the vulnerable code does not properly restrict operations within the bounds of a memory buffer while processing malformed or oversized NALU data, leading to heap memory corruption during RTP/NALU reassembly in low-level Qualcomm firmware. Because the affected code resides in privileged closed-source communication firmware, successful exploitation may enable arbitrary code execution in a highly trusted execution context.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical remote code execution vulnerability in Qualcomm Snapdragon firmware caused by malformed RTP/NALU processing that can lead to heap-based buffer overflow and arbitrary code execution at the firmware level without authentication or user interaction.
Another Qualcomm vulnerability disclosed in the same security bulletin that affected core communication modules.
Unknown (listed as a trending/high-risk CVE associated with Qualcomm; no technical details provided in the content).
A critical vulnerability in a Qualcomm closed-source component affecting Android devices, details provided by Qualcomm.
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.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.