PT-2026-52571 · Wolfssl · Wolfssl
Publicado
2026-06-25
·
Atualizado
2026-06-25
·
CVE-2026-55958
CVSS v4.0
8.3
Alta
| Vetor | AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Out-of-bounds write in the Renesas TSIP TLS 1.3 transcript buffer. In tsip StoreMessage() the capacity check guarding the fixed message bag (MSGBAG SIZE) sets an error code but fails to return, so execution falls through to an XMEMCPY that writes past the end of the buffer once the accumulated TLS 1.3 handshake transcript exceeds MSGBAG SIZE (8 KB), corrupting adjacent heap state and potentially causing a remote denial of service crash. The bag is sized to hold a normal handshake, so this is reached only by an unusually large but valid certificate chain, or by a malicious or man-in-the-middle server sending an oversized handshake message to a client that does not strictly verify the chain. This only affects builds using the Renesas TSIP TLS port (WOLFSSL RENESAS TSIP TLS) as a TLS 1.3 client on Renesas MCUs with TSIP hardware enabled, and is rated High within those builds. All other configurations are unaffected.
Correção
Memory Corruption
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Identificadores relacionados
Produtos afetados
Wolfssl