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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, also referred to as the Quram image codec. The flaw affects Samsung mobile devices prior to SMR Sep-2025 Release 1 and has been reported to impact Android 13, 14, 15, and 16 on affected Samsung builds. The vulnerability is triggered while parsing a specially crafted image, causing attacker-controlled data to be written past the bounds of an allocated buffer. Although the exact vulnerable function has not been publicly disclosed, the issue resides in the library’s image decoding/parsing logic and was fixed by correcting an incorrect implementation. Successful exploitation can result in arbitrary code execution in the context of the image-processing component or consuming application. The vulnerability was disclosed as exploited in the wild as a zero-day.
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No public exploit code observed for this vulnerability.
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93 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.
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.