{"id":"CVE-2026-73558","title":"vLLM is an inference and serving engine for large language models","summary":"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 reque…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","cwe":["CWE-190"],"vendor":"vllm","product":"vllm","affected":["vllm < 0.27.0"],"patched":["vllm 0.27.0"],"published":"2026-08-13","updated":"2026-09-28","sourceUpdated":"2026-09-28T18:41:49.083","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73558","references":[{"url":"https://github.com/vllm-project/vllm/commit/451227cb3ff07989698fed982c2d3e4300257924","label":"security-advisories@github.com"},{"url":"https://github.com/vllm-project/vllm/issues/42860","label":"security-advisories@github.com"},{"url":"https://github.com/vllm-project/vllm/pull/49660","label":"security-advisories@github.com"},{"url":"https://github.com/vllm-project/vllm/releases/tag/v0.27.0","label":"security-advisories@github.com"},{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5","label":"security-advisories@github.com"},{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73558"},{"url":"https://github.com/vllm-project/vllm"},{"url":"https://github.com/advisories/GHSA-7m6h-x95x-82q5"},{"url":"https://pypi.org/project/vllm"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73558.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-73558"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2515383"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-73558"},{"url":"https://access.redhat.com/errata/RHSA-2026:82415"},{"url":"https://access.redhat.com/errata/RHSA-2026:82368"},{"url":"https://access.redhat.com/errata/RHSA-2026:82061"},{"url":"https://access.redhat.com/errata/RHSA-2026:82059"},{"url":"https://access.redhat.com/errata/RHSA-2026:82371"}],"tags":["nvd","osv","pip","ghsa","csaf","vex","red-hat"],"aliases":["GHSA-7m6h-x95x-82q5","PYSEC-2026-3935"],"ecosystem":"pip","ingestedAt":"2026-09-08T21:11:12.323Z","epss":0.00414,"epssPercentile":0.35479,"slug":"CVE-2026-73558","body":"## Overview\n\nvLLM 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.\n\n## Affected\n\n- `vllm < 0.27.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `vllm 0.27.0`\n\n## Package advisory (CVE-2026-73558)\n\nAffected packages:\n\n- `vllm < 0.27.0`\n\nPatched in:\n\n- `vllm 0.27.0`\n\nSource: https://osv.dev/vulnerability/GHSA-7m6h-x95x-82q5\n\n## Vendor advisories\n\n- **RHSA-2026:82415** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82415)\n- **RHSA-2026:82368** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82368)\n- **RHSA-2026:82061** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82061)\n- **RHSA-2026:82059** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82059)\n- **RHSA-2026:82371** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82371)\n- **Red Hat VEX** · Moderate · affected: Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI) · no fix planned: Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI) · updated 2026-10-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73558.json)","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}