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CVE-2023-30612

18
FAUCET Score

CVE-2023-30612 is a denial-of-service (DoS) vulnerability affecting Cloud Hypervisor versions 30.0, 31.0, and the upstream main branch. It allows an attacker with write access to the HTTP API socket to crash the hypervisor by sending a malicious HTTP request that closes arbitrary file descriptors. This medium-severity vulnerability (CVSS 4.9) also presents a potential Use-After-Free (UAF) risk. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE. Mitigation involves upgrading to versions 30.1 or 31.1, or restricting write access to the API socket to trusted users.

Impacted Technologies

VendorProductVersion(s)CPE
30.0CPE matchmatch criteria
cpe:2.3:a:cloudhypervisor:cloud_hypervisor:30.0:*:*:*:*:rust:*:*
31.1CPE matchmatch criteria
cpe:2.3:a:cloudhypervisor:cloud_hypervisor:31.1:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

4.0MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
0.6
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 23rd percentile among its peer group of 3,563 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: cbl2 cloud-hypervisor 31.1-1 on CBL Mariner 2.0Fixed in: 31.1-1
microsoftpatch availablevia msrc
Product: 18379-16823Fixed in: 31.1-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 31.1-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 31.1-1

Vendor Advisories (2)

microsoft2023-Jun/CVE-2023-30612

CVE-2023-30612

Jun 13, 2023
microsoft2023-Apr/CVE-2023-30612Moderate

Malicious HTTP requests could close arbitrary opening file descriptors in cloud-hypervisor

Apr 11, 2023

References

github.com / cloud-hypervisor/cloud-hypervisor/pull/5350
Patch
github.com / cloud-hypervisor/cloud-hypervisor/pull/5373
Patch
github.com / cloud-hypervisor/cloud-hypervisor/security/advisories/GHSA-g6mw-f26h-4jgp
PatchVendor Advisory
oss-fuzz.com / testcase-detail/5260873569796096
Permissions Required
oss-fuzz.com / testcase-detail/5426283514560512
Permissions Required