CVE-2026-7141
mediumpriority · track · 0EPSS 0.005 · 40 %ileDEEUUSEPSS · scored 2026-10-24
A vulnerability was found in vLLM up to 0.19.0. The affected element is the function has_mamba_layers of the file vllm/v1/kv_cache_interface.py of the component KV Block Handler. Performing a manipulation results in uninitialized resource. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. The exploit has been made public and could be used. The existence of this vulnerability is still disputed at present. The proposed patch did not fix the issue. A 3rd party explains: "The divergence could be explained by a benign and expected vLLM behavior where vLLM server could group concurrent requests together resulting in different input shapes based on varying request arrival time. The differences in grouped input shapes could call different kernels with could produce difference results due to rounding and differences in order of operations. There is an environment variable VLLM_BATCH_INVARIANT=1 for users that desire to have deterministic output with temperature 0.0."
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.7–6.3
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (23)
Products and version ranges known to be affected.
advisories (3)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-1289vllm (KV Block Handler): Schwachstellen ermöglicht Manipulation von DateienDeutsch2026-04-27csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in vllm ausnutzen, um Daten zu manipulieren und nicht näher spezifizierte Angriffe durchzuführen, wodurch vertrauliche Informationen offengelegt werden oder ein Denial-of-Service-Zustand entstehen können.
- GHSA-x368-4g9h-fvv4vLLM makes Use of Uninitialized Resource2026-04-27ghsa · osvUS
A vulnerability was found in vLLM up to 0.19.0. The affected element is the function has_mamba_layers of the file vllm/v1/kv_cache_interface.py of the component KV Block Handler. Performing a manipulation results in uninitialized resource. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. The exploit has been made public and could be used. The patch is named 1ad67864c0c20f167929e64c875f5c28e1aad9fd. To fix this issue, it is recommended to deploy a patch.
- PYSEC-2026-23062026-04-27vendor · osvUS
A vulnerability was found in vllm up to 0.19.0. The affected element is the function has_mamba_layers of the file vllm/v1/kv_cache_interface.py of the component KV Block Handler. Performing a manipulation results in uninitialized resource. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. The exploit has been made public and could be used. The patch is named 1ad67864c0c20f167929e64c875f5c28e1aad9fd. To fix this issue, it is recommended to deploy a patch.
also known as (6)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (15)
External citations — patches, advisories, analysis.
- https://github.com/vllm-project/vllm/releasesPatchcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2026-7141cnnvd
- https://github.com/AjAnubolu/vllm/commit/1ad67864c0c20f167929e64c875f5c28e1aad9fdenisa_euvd
- https://github.com/vllm-project/vllm/issues/39146enisa_euvd
- https://github.com/vllm-project/vllm/issues/39146#issue-4215090365enisa_euvd
- https://github.com/vllm-project/vllm/pull/39283enisa_euvd
- https://vuldb.com/submit/801297enisa_euvd
- https://vuldb.com/vuln/359740enisa_euvd
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