Assertion Vulnerability in InternLM LMDeploy by InternLM
CVE-2026-92971

8.7HIGH

Key Information:

Vendor

Internlm

Status
Lmdeploy
Vendor
CVE Published:
17 September 2026

What is CVE-2026-92971?

InternLM's LMDeploy version 0.17.0 contains a reachable assertion vulnerability within the DistServe decode migration loop. This flaw allows unauthenticated attackers to submit a migration request with an empty list of remote block IDs, resulting in an AssertionError that can crash the inference engine. As a consequence, any subsequent inference requests are rendered inoperative, presenting a significant risk for service interruption and potential exploitation.

Affected Version(s)

lmdeploy 0 <= 0.17.0

References

https://github.com/InternLM/lmdeploy/issues/4965
issue-tracking
https://github.com/InternLM/lmdeploy/blob/v0.17.0/lmdeplo...
technical-description
https://github.com/InternLM/lmdeploy/blob/v0.17.0/lmdeplo...
technical-description

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jiapeng Li
Jiajia Liu
.