Bug 2420117 (CVE-2025-59391)

Summary: CVE-2025-59391 libcoap: libcoap: Out-of-bounds read in OSCORE configuration parser leads to information disclosure
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in libcoap. This vulnerability allows information disclosure or denial of service via an out-of-bounds read when parsing certain OSCORE (Object Security for Constrained RESTful Environments) configuration values.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2421322, 2421323    
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Description OSIDB Bzimport 2025-12-08 18:05:22 UTC 
A memory disclosure vulnerability exists in libcoap's OSCORE configuration parser in libcoap before release-4.3.5-patches. An out-of-bounds read may occur when parsing certain configuration values, allowing an attacker to infer or read memory beyond string boundaries in the .rodata section. This could potentially lead to information disclosure or denial of service.