CVE-2026-103042CWE-770denial-of-service

CVE-2026-103042

High · published September 30, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
43.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00520 · 43.3th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-09-30T03:17Z
References (7)
https://github.com/ModelTC/LightLLM · [email protected]https://github.com/ModelTC/LightLLM/issues/1595 · [email protected]https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode_backend/pd/base_kv_move_manager.py#L121-L122 · [email protected]https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode_backend/pd/nccl_kv_transporter.py#L416-L420 · [email protected]https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode_backend/pd/nccl_kv_transporter.py#L474-L485 · [email protected]https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-memory-exhaustion-via-nccl-control-channel-set-value · [email protected]https://github.com/ModelTC/LightLLM/issues/1595 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 03 OCT 03:41Z
    EPSS moved — → 1%
    epss
  • 29 SEP 22:51Z
    LightLLM through 1.2.0 Unauthenticated Memory Exhaustion via NCCL Control Channel set_value
    cvelistv5