{"schema":"threatline.record/2","record":{"id":"CVE-2026-103042","aliases":[],"summary":"LightLLM through 1.2.0 Unauthenticated Memory Exhaustion via NCCL Control Channel set_value","details":"LightLLM through 1.2.0 contains a memory exhaustion vulnerability in the NCCL control channel when started with --pd_trans_mode nccl, allowing unauthenticated attackers to exhaust KV-transfer worker memory. Attackers can call the exposed_set_value method to store unbounded key-value pairs without size limits, causing the worker process to crash and triggering node failure.","categories":["Unclassified"],"product":"LightLLM","vendor":"ModelTC","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-103042","source_modified_at":"2026-10-02T12:32:08.509Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"LightLLM","vendor":"ModelTC","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"1.2.0"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.0052,"percentile":0.4334,"score_date":"2026-10-23"},"published_at":"2026-09-29T22:51:01.631Z","modified_at":"2026-10-02T12:32:08.509Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-103042","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-02T12:32:08.509Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-103042","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/ModelTC/LightLLM/issues/1595","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode_backend/pd/nccl_kv_transporter.py#L416-L420","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode_backend/pd/nccl_kv_transporter.py#L474-L485","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode_backend/pd/base_kv_move_manager.py#L121-L122","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/ModelTC/LightLLM","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-memory-exhaustion-via-nccl-control-channel-set-value","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-02T12:31:46.084047Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-02T12:32:08.509Z","content_hash":"721d22b359006ad095296da0c6147816713f0c7d18d7874e49753364ee7b8458"}}