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CVE-2024-8939

18
FAUCET Score

CVE-2024-8939 describes a Denial of Service (DoS) vulnerability in the ilab model serve component, specifically within its vllm JSON web API. This flaw arises from improper handling of the "best_of" parameter, which, when set to a large value, causes resource exhaustion and unresponsiveness. The vulnerability has a CVSS score of 6.2 (Medium), indicating a low attack complexity and no user interaction required, with the primary impact being high availability loss. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
Red HatRed Hat Enterprise Linux AI (RHEL AI)
All Versions ImpactedCNA affecteddefault affected
Https://Github.Com/Vllm-Project/VllmVllm
>= 0, < 0.5.0.post1CNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 3.1

6.2MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.5
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.23%
Probability of exploitation in next 30 days
EPSS Percentile
14.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0023 is in the 23rd percentile among its peer group of 3,052 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux AI (RHEL AI)Fixed in: rhelai1/bootc-nvidia-rhel9
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux AI (RHEL AI)Fixed in: rhelai1/instructlab-nvidia-rhel9

Vendor Advisories (2)

pipGHSA-wc36-9694-f9rfmedium

vLLM Denial of Service via the best_of parameter

Sep 17, 2024
redhatCVE-2024-8939Moderate

vllm: Denials of Service in vllm JSON web API

Sep 17, 2024

References

access.redhat.com / security/cve/CVE-2024-8939
bugzilla.redhat.com / show_bug.cgi