Threats Tagged 'cve-2026-103634'

An out-of-bounds read and write vulnerability exists in the Count-Min sketch deserialization function of Apache DataSketches C++ between versions 4.1.0 and before 5.3.0. The deserialization process does not properly validate input size, allowing reads past the input buffer. Additionally, a crafted serialized sketch can cause integer overflow in table size calculation, leading to heap memory corruption during later operations. This can cause crashes and potentially enable further exploitation. Only applications deserializing Count-Min sketches from untrusted sources are affected. Upgrading to version 5.3.0 resolves the issue.

Out-of-bounds read and write in the Count-Min sketch deserialization of Apache DataSketches C++ (repo: datasketches-cpp). count_min_sketch::deserialize() did not include the preamble in its input size check, so a truncated sketch could cause a read of up to 16 bytes past the end of the input. In addition, the table size was computed from the serialized number of buckets and number of hash functions in 32-bit arithmetic. A crafted sketch could make it wrap to zero, so that the sketch deserialized with an empty table, and later updates and estimate queries read and wrote outside the heap allocation. This can corrupt heap memory, causing a crash and potentially enabling further exploitation. This issue affects Apache DataSketches C++: from 4.1.0 before 5.3.0. Only applications that deserialize Count-Min sketches from untrusted sources are affected. Users are recommended to upgrade to version 5.3.0, which fixes this issue.