CVE-2023-35862

Name: CVE-2023-35862
Creator: NVD / NIST
Published: 2023-06-19T05:15:09.713+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.76%

Last modified Jun 17, 2026

CVE-2023-35862 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. libcoap 4.3.1 contains a buffer over-read via the function coap_parse_oscore_conf_mem at coap_oscore.c.. EPSS estimates a 0.76% chance of exploitation in the next 30 days.

Description

libcoap 4.3.1 contains a buffer over-read via the function coap_parse_oscore_conf_mem at coap_oscore.c.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.76%

50.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Libcoap	Libcoap	4.3.1

References

https://github.com/obgm/libcoap/issues/1117Exploit, Issue Tracking, Third Party Advisory
https://github.com/obgm/libcoap/pull/1118Patch
https://github.com/obgm/libcoap/tagsProduct
https://github.com/obgm/libcoap/issues/1117Exploit, Issue Tracking, Third Party Advisory
https://github.com/obgm/libcoap/pull/1118Patch
https://github.com/obgm/libcoap/tagsProduct

Timeline

Published: Jun 19, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-35862?

libcoap 4.3.1 contains a buffer over-read via the function coap_parse_oscore_conf_mem at coap_oscore.c.

How severe is CVE-2023-35862?

CVE-2023-35862 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.

How do I fix CVE-2023-35862?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-35862?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST