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Vulnerability record · CVE-2023-35862 · published 19 June 2023

CVE-2023-35862: Libcoap out-of-bounds read vulnerability

Libcoap · Libcoap

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

6.5 CVSS 3.1 Medium EPSS 0.76% · top 46.5% CWE-125 · Out-of-bounds read
6.5CVSS 3.1 base score
0.76%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/obgm/libcoap/issues/1117 ExploitIssue TrackingThird Party Advisory
https://github.com/obgm/libcoap/pull/1118 Patch
https://github.com/obgm/libcoap/tags Product
https://github.com/obgm/libcoap/issues/1117 ExploitIssue TrackingThird Party Advisory
https://github.com/obgm/libcoap/pull/1118 Patch
https://github.com/obgm/libcoap/tags Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-35862), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.