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BIT-LIBPYTHON-2024-5642 Buffer overread when using an empty list with SSLContext.set_npn_protocols()

🗓️ 14 Oct 2025 09:24:35Reported by GoogleType 
osv
 osv🔗 osv.dev👁 4 Views

Buffer overread in CPython <=3.9 when SSLContext.set_npn_protocols uses an empty list; CVE-2024-5535.

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14 Oct 2025 09:53Current
8.7High risk
Vulners AI Score8.7
CVSS 3.19.1
EPSS0.05582
SSVC
buffer overreadpython older versionsopenssl vulnerabilitynext protocol negotiationempty protocol list
4