{"id":"UBUNTU-CVE-2026-33298","details":"llama.cpp is an inference of several LLM models in C/C++. Prior to b7824, an integer overflow vulnerability in the `ggml_nbytes` function allows an attacker to bypass memory validation by crafting a GGUF file with specific tensor dimensions. This causes `ggml_nbytes` to return a significantly smaller size than required (e.g., 4MB instead of Exabytes), leading to a heap-based buffer overflow when the application subsequently processes the tensor. This vulnerability allows potential Remote Code Execution (RCE) via memory corruption. b7824 contains a fix.","modified":"2026-05-20T16:25:28.133878375Z","published":"2026-03-24T01:17:00Z","upstream":["CVE-2026-33298"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33298"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-33298"},{"type":"REPORT","url":"https://github.com/ggml-org/llama.cpp/releases/tag/b7824"},{"type":"REPORT","url":"https://github.com/ggml-org/llama.cpp/security/advisories/GHSA-96jg-mvhq-q7q7"}],"affected":[{"package":{"name":"llama.cpp","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/llama.cpp?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5318+dfsg-1","5318+dfsg-2","5713+dfsg-1","5760+dfsg-1","5760+dfsg-3","5760+dfsg-4","5882+dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_version":"5882+dfsg-2","binary_name":"llama.cpp"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33298.json"}},{"package":{"name":"llama.cpp","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/llama.cpp?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5882+dfsg-2","8064+dfsg-1ubuntu1","8681+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_version":"8681+dfsg-1","binary_name":"libllama0"},{"binary_name":"llama.cpp","binary_version":"8681+dfsg-1"},{"binary_name":"llama.cpp-examples","binary_version":"8681+dfsg-1"},{"binary_version":"8681+dfsg-1","binary_name":"llama.cpp-tests"},{"binary_name":"llama.cpp-tools","binary_version":"8681+dfsg-1"},{"binary_name":"llama.cpp-tools-extra","binary_version":"8681+dfsg-1"},{"binary_version":"8681+dfsg-1","binary_name":"python3-gguf"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33298.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}