{"id":"UBUNTU-CVE-2026-107183","details":"llama.cpp before b11393 contains a use-after-free and double free vulnerability in common_chat_peg_mapper::map that allows unauthenticated remote attackers to corrupt heap memory via a dangling current_tool pointer. Attackers can submit a chat_parser in a POST /completion request emitting a tool-id after a tool-close tag to crash llama-server and shape a heap write primitive.","modified":"2026-10-08T19:47:03.004513784Z","published":"2026-10-08T00:00:00Z","upstream":["CVE-2026-107183"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-107183"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-107183"},{"type":"REPORT","url":"https://github.com/ggml-org/llama.cpp/pull/29942"},{"type":"REPORT","url":"https://github.com/ggml-org/llama.cpp"},{"type":"REPORT","url":"https://github.com/ggml-org/llama.cpp/blob/bed0a856606ee4a24a164066f73d2379447033f5/common/chat-peg-parser.cpp#L343-L355"},{"type":"REPORT","url":"https://github.com/ggml-org/llama.cpp/blob/bed0a856606ee4a24a164066f73d2379447033f5/tools/server/server-schema.cpp#L321-L324"},{"type":"REPORT","url":"https://github.com/ggml-org/llama.cpp/commit/dbe4c3ed42343f0a7ba0fd7e808ffeaca404d29f"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/llama-cpp-before-b11393-use-after-free-via-common-chat-peg-mapper-chat-parser"}],"affected":[{"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_name":"libllama0","binary_version":"8681+dfsg-1"},{"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-2026-107183.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}