{"id":"CVE-2026-103501","revision":"0ef938aeeb094ee091c568455321c0f8","records":[{"revision":"0ef938aeeb094ee091c568455321c0f8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-103501","aliases":[],"title":"Apache DataSketches: datasketches-cpp: HLL CouponList Deserialization Buffer Overflow allows memory corruption via a crafted sketch","description":"Heap buffer overflow in the HLL sketch deserialization of Apache DataSketches C++ (repo: datasketches-cpp).\n\nWhen deserializing a sketch in LIST mode, from either a byte buffer or a stream, the coupon count was read from the input and used as the number of entries to copy into a fixed buffer of 8 entries, without checking it against the buffer's capacity. A crafted sketch could cause a write of up to 988 bytes past the end of this internal heap buffer. This can corrupt heap memory, causing a crash and potentially enabling further exploitation.\n\nThis issue affects Apache DataSketches C++: from 1.0.0-incubating before 5.3.0. Only applications that deserialize HLL sketches from untrusted sources are affected.\n\nUsers are recommended to upgrade to version 5.3.0, which fixes this issue.","state":0,"publishedAt":"2026-10-10T10:22:55.843+00:00","modifiedAt":"2026-10-16T15:22:14.055+00:00","affected":[{"ecosystem":"https://github.com","name":"apache/datasketches-cpp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Apache Software Foundation\",\n                    \"product\": \"Apache DataSketches\",\n                    \"packageURL\": \"pkg:github/apache/datasketches-cpp\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"1.0.0-incubating\",\n                            \"lessThanOrEqual\": \"5.2.0\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"collectionURL\": \"https://github.com\",\n                    \"packageName\": \"apache/datasketches-cpp\"\n                }"}],"metrics":[],"references":["https://lists.apache.org/thread/n2oc2j841dzsv4239jjp08of66bo79c5","https://github.com/apache/datasketches-cpp/releases/tag/5.3.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103501","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-103501","identifiers":["CVE-2026-103501"]},"retained":false,"historicalAffected":[]}],"coverage":[]}