Integer overflow in Vllm-project Vllm
CVE-2026-73558
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…
Vulnerability class: Integer Overflow
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N.
Affected products
- Vllm-project Vllm — versions < 0.27.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-73558?
- CVE-2026-73558 is a medium-severity vulnerability in Vllm-project Vllm, classified under Integer Overflow or Wraparound. CVSS score: 5.3/10. Published 2026-08-13.
- How severe is CVE-2026-73558?
- Medium severity. CVSS v3 base score is 5.3 out of 10.