CVE-2026-73558 Details
Description
vLLM is an inference and serving engine for large language models. Prior to 0.27.0, an integer overflow in blockIdx.x * 2 * d in activation_kernels.cu can cause act_and_mul_kernel to consume another batched user's input, allowing a request processed in the same inference batch to receive a partial or complete copy of another user's inference result. This issue is fixed in version 0.27.0.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5 | CISA-ADP | ExploitVendor Advisory |
| https://github.com/vllm-project/vllm/commit/451227cb3ff07989698fed982c2d3e4300257924 | [email protected] | Patch |
| https://github.com/vllm-project/vllm/issues/42860 | [email protected] | Issue TrackingPatch |
| https://github.com/vllm-project/vllm/pull/49660 | [email protected] | Issue TrackingPatch |
| https://github.com/vllm-project/vllm/releases/tag/v0.27.0 | [email protected] | Release Notes |
| https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5 | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-190 | Integer Overflow or Wraparound | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| vllm vllm | < 0.27.0 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 28, 2026 | Initial Analysis | [email protected] |
| Aug 13, 2026 | CVE Modified | CISA-ADP |
| Aug 13, 2026 | New CVE Received | [email protected] |