{"id":"CVE-2026-118769","revision":"7c8f4e05f5654edc8dee50666b2056a7","records":[{"revision":"7c8f4e05f5654edc8dee50666b2056a7","observedAt":"2026-10-29T19:28:49.708+00:00","statement":{"source":"cve-program","id":"CVE-2026-118769","aliases":[],"title":"Botan: Integer overflow when reporting block size in FFI can cause memory corruption","description":"Botan is a C++ cryptography library. From 2.1.0 until 3.13.0, the Botan C API function botan_block_cipher_block_size converted a size_t block size to int without a bounds check. In an application that accepts external algorithm parameter strings and uses the FFI raw ECB mode, an attacker can select the variable-block-size Lion cipher so that the reported size is truncated, the caller allocates insufficient memory, and later block processing causes memory corruption. The C++ API and normally used C API modes such as CBC and CTR are unaffected. This issue is fixed in version 3.13.0.","state":0,"publishedAt":"2026-10-29T17:22:07.316+00:00","modifiedAt":"2026-10-29T17:22:07.316+00:00","affected":[{"ecosystem":"Vendor product","name":"botan","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"randombit\",\n                    \"product\": \"botan\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 2.1.0, < 3.13.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.2,"severity":"CRITICAL"}],"references":["https://github.com/randombit/botan/security/advisories/GHSA-c68p-822g-jfvr","https://github.com/randombit/botan/pull/5805","https://github.com/randombit/botan/commit/c6089ab7fab616517d56c447c93e13a5c57a0af3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118769","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-118769","identifiers":["CVE-2026-118769"]},"retained":false,"historicalAffected":[]}],"coverage":[]}