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CVE-2025-21043 is a critical out-of-bounds write vulnerability in Samsung's proprietary image parsing library libimagecodec.quram.so (Quram image codec) affecting Samsung mobile devices prior to SMR Sep-2025 Release 1. Samsung describes the issue as an incorrect implementation that permits memory to be written past the bounds of an allocated buffer while processing attacker-controlled image content. Public reporting indicates the flaw is reachable during parsing of specially crafted image files, although the exact vulnerable function has not been publicly disclosed. Successful exploitation can corrupt memory in the image-processing context and lead to arbitrary code execution on affected Samsung Android devices. The issue was reported to Samsung by the Meta and WhatsApp security teams and Samsung stated an exploit existed in the wild before the patch was released.
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92 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Samsung Android zero-day out-of-bounds write vulnerability exploited in attacks, enabling arbitrary code execution.
A separate Samsung image-library vulnerability disclosed by Samsung as exploited in the wild; the article notes it is not evidenced as part of the LANDFALL exploitation chain.
Another vulnerability in Samsung's libimagecodec.quram.so library, reported as exploited as a zero-day against Samsung Android devices; technical details are not provided in the content.
A referenced zero-day vulnerability (CVE) associated with an exploit chain similar to that used to deliver commercial-grade Android spyware via malicious image files shared over WhatsApp (the content notes no unknown WhatsApp vulns were found).
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.
Community discussion across Reddit, Mastodon, and other social sources.