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CVE-2023-0397

22
FAUCET Score

CVE-2023-0397 is a denial-of-service vulnerability affecting Zephyr Project's Zephyr operating system. A malicious or defective Bluetooth controller can trigger this flaw due to unchecked input in the le_read_buffer_size_complete function. With a CVSS score of 6.5 (Medium), this vulnerability can be exploited with low attack complexity over an adjacent network, requiring no user interaction or privileges, and leading to a high availability impact. Currently, there is no evidence of active exploitation, and no public exploit code or Metasploit modules are available. The vulnerability has also received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.2.0CPE matchmatch criteria
cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.6CRITICAL

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
38.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 58th percentile among its peer group of 1,802 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

Remediation records are not available for this CVE.

References

github.com / zephyrproject-rtos/zephyr/security/advisories/GHSA-wc2h-h868-q7hj
ExploitThird Party Advisory