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CVE-2023-4263

24
FAUCET Score

CVE-2023-4263 is a high-severity buffer overflow vulnerability affecting the Zephyr IEEE 802.15.4 nRF 15.4 driver within the Zephyr Project. This vulnerability, with a CVSS score of 8.8, can be exploited remotely over an adjacent network with low attack complexity and no user interaction, potentially leading to high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.4.0CPE matchmatch criteria
cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.6HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 38th percentile among its peer group of 1,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/175657/Zephyr-RTOS-3.x.0-Buffer-Overflows.html
Third Party Advisory
seclists.org / fulldisclosure/2023/Nov/1
Mailing ListThird Party Advisory
github.com / zephyrproject-rtos/zephyr/security/advisories/GHSA-rf6q-rhhp-pqhf
Third Party Advisory
openwall.com / lists/oss-security/2023/11/07/1
Mailing List