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Decompression bomb in vLLM audio input lets attackers exhaust memory

Priority LOW 31CWE-409Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

vLLM from 0.19.0 before 0.24.0 contains a decompression bomb flaw in the AudioMediaIO multimodal path, which calls load_audio without the max_duration_s decoded-duration limit (CWE-409). An authenticated attacker can send small compressed audio through input_audio or audio_url in chat completion requests that expands to a huge decoded PCM buffer, exhausting server memory.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

vLLM from 0.19.0 before 0.24.0 contains a decompression bomb vulnerability because the AudioMediaIO multimodal path calls load_audio without the max_duration_s decoded-duration limit. Authenticated attackers can send small compressed audio via input_audio or audio_url in /v1/chat/completions requests that expands to huge decoded PCM, exhausting server memory.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00314 24th percentileScored 2026-11-07
Fix Partial vllm (vllm-project): 0.24.0Red Hat: 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
vllm-projectvllm0.19.0 to before 0.24.00.24.0Patch availableCNA
  • vllm Vendorvllm-project Affected 0.19.0 to before 0.24.0 Fixed in 0.24.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*0.19.0 to before 0.24.0VulnerablevLLM
  • cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* Versions 0.19.0 to before 0.24.0 Vulnerable ·vLLM

Remediation

Upgrade vLLM to version 0.24.0. Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3 and Red Hat OpenShift AI (RHOAI) are affected without a fix, and Red Hat lists no planned fix for them.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA vllm (vllm-project) Fixed in 0.24.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    vllm-project vllm 0.24.0

    5 records Highest priority Priority MEDIUM 1 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2026-80194 Server-side request forgery in vLLM P2pNcclConnector via X-Request-IdPriority MEDIUM 44
    • TI-2026-80191 Denial of service in vLLM via crafted gRPC logprob token requestsPriority LOW 36
    • TI-2026-80190 Denial of service in vLLM Rust gRPC converter via top_nPriority LOW 36

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat AI Inference ServerAffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-25 Threatist record created from CVE-2026-116175
  2. 2026-10-25 Affected versions changed · Red Hat
  3. 2026-10-25 CVSS score added · Red Hat
  4. 2026-10-26 CISA SSVC decision points changed
  5. 2026-10-26 Priority changed: MEDIUM → LOW
  6. 2026-10-27 Alias added: GHSA-vchq-p6cc-h35x

References

  • TI-2024-10229 Remote Code Execution in vllm-project/vllm CVSS 3.0CRITICAL 9.8
  • TI-2024-08404 Remote Code Execution in vllm-project/vllm CVSS 3.1CRITICAL 9.8
  • TI-2026-36017 vLLM: OpenAI auth bypass CVSS 3.1CRITICAL 9.1
  • TI-2026-63056 vLLM before 0.28.0 Denial of Service via negative token ID CVSS 4.0HIGH 8.7
  • TI-2026-04308 Hardcoded trust_remote_code=True in vllm-project/vllm Bypasses User Security Control CVSS 3.0HIGH 8.8
  • TI-2026-39137 vLLM: Remote DoS in vLLM via Invalid Recovered Token Reinjection CVSS 3.1HIGH 7.5
See all 124 →

Sources